Save

An Unpublished Manuscript of Hugo Grotius: ‘On Public Partnership with Unbelievers’ (De societate publica cum infidelibus): Introduction, Transcription and English Translation

In: Grotiana
Authors:
Diederik Burgersdijk Faculty of Humanities, Utrecht University, Utrecht, The Netherlands

Search for other papers by Diederik Burgersdijk in
Current site
Google Scholar
PubMed
Close
,
Henk Nellen Huygens Institute for the History of the Netherlands, Amsterdam, The Netherlands

Search for other papers by Henk Nellen in
Current site
Google Scholar
PubMed
Close
, and
Marc de Wilde Faculty of Law, University of Amsterdam, Amsterdam, The Netherlands

Search for other papers by Marc de Wilde in
Current site
Google Scholar
PubMed
Close
Open Access

Abstract

This introduction presents an analysis of Grotius’s treatise ‘On Public Partnership with Unbelievers’ (De societate publica cum infidelibus). It was probably written between 1606 and 1609, when Grotius served as a legal advisor of the Dutch East India Company (voc). In his treatise, Grotius explains what kinds of partnerships with non-Christians are permissible under divine and natural law. These include public partnerships, such as treaties and military alliances, but also private associations, such as commercial contracts, marriages and relations of servitude. As we argue in this introduction, De societate can be interpreted as a general treatise on legal partnerships with non-Christians, which relates both to the voc’s policies of treaty and alliance-making in the East Indies and to debates about the legal status of religious minorities in the Dutch Republic.

Picture 1
Picture 1

First page of De societate publica cum infidelibus, written in the hand of Grotius. The page contains the title, followed by a short introduction and ten premises. Leiden University Library, ms bpl 922 Ie, fol. 314r.

Citation: Grotiana 45, 1 (2024) ; 10.1163/18760759-20240001

1 Introduction1

The Leiden University Library has an important collection of manuscripts of the Dutch humanist and international lawyer Hugo Grotius (1583–1645). Apart from the famous manuscript of De iure praedae (On the Law of Prize and Booty), it possesses a collection of legal and political manuscripts, which includes an unpublished autograph, entitled De societate publica cum infidelibus, ‘On Public Partnership with Unbelievers’.2 The existence of De societate has been known since 1864, when it was discovered by the bibliographer Pieter Anton Tiele during preparations for an auction of a large collection of Grotius’s manuscripts and working papers.3 However, it was largely ignored by scholars until Peter Borschberg described it in an article published in 1998.4 Borschberg identified De societate as an early work of Grotius, probably written in the first decade of the seventeenth century. Analyzing the text and its sources, he concluded that De societate was written in connection with De iure praedae – a title that was posthumously given to a work to which Grotius himself referred as De rebus Indicis (On Indian Affairs).5 As Borschberg explained, in both treatises, Grotius’s aim was to defend the Dutch policies of treaty and alliance-making in the East Indies, and more particularly, the right of the Dutch East India Company (voc) to enter into alliances with non-Christian rulers that were aimed against the Spaniards and Portuguese.6

Borschberg’s thorough analysis of De societate has remained the standard interpretation in the literature. As no transcription or translation of De societate was available, scholars tended to consult Borschberg’s analysis of the text, rather than the text itself. However, in our view, there are several reasons why it is valuable for jurists and historians to study the original text of De societate. First of all, Grotius’s treatise is important for understanding his ideas about legal relations between Christians and non-Christians (e.g., Jews and Muslims). In De societate, Grotius explains what kinds of public and private partnerships with non-Christians are lawful, both in the international context (e.g., treaties and alliances with non-Christian rulers) and in the domestic context (e.g., legal relations with non-Christian minorities residing in Christian states). Secondly, De societate gives important insights into Grotius’s ideas about the relationship between natural law and Christian law and, more particularly, the role of natural law as a source of universal legal norms which apply across cultural and religious boundaries. For instance, in his treatise, Grotius explains that partnerships between Christians and non-Christians are generally permissible under natural law, while they should also be limited and regulated on the basis of Christian law. And finally, De societate may contribute to a better understanding of the connection between Grotius’s earlier and later writings. As we will show in this introduction, there are many parallels between De societate and some of Grotius’s other writings, notably De iure praedae, the Remonstrantie (Remonstrance, 1615), and De iure belli ac pacis (On the Law of War and Peace, 1625).7 Studying De societate may thus contribute to a better understanding of how Grotius’s ideas about legal relations between Christians and non-Christians developed over time.8 For these reasons, we have decided to publish the first complete transcription and English translation of Grotius’s text.

In recent years, there has been increasing attention for Grotius’s role as legal advisor of the Dutch East India Company.9 The fact that the ‘founding father of modern international law’ had also been active as voc advisor has attracted the attention of jurists and historians who seek to understand how his ideas about international law related to his defense of Dutch empire-building in Asia and the East Indies. This has led to a renewed interest in Grotius’s De societate: as a renowned historian puts it, De societate shows that Grotius was ‘himself in the forefront of the Dutch attempts in these years to build a network of alliances with infidels against the Portuguese’.10 Like Borschberg, historians such as Richard Tuck and Martine van Ittersum believe that Grotius wrote De societate alongside De iure praedae to demonstrate that the voc’s alliances with non-Christian rulers in the East Indies were justified by the law of nature.11 As is well known, Grotius had written De iure praedae at the request of the Amsterdam Chamber of the voc to defend the seizure of a Portuguese vessel, the Santa Catarina, off the coast of Johor (present-day Singapore).12 As Grotius argued in his treatise, the voc had entered into an alliance with the (Muslim) king of Johor on behalf of the Dutch Estates General; the voc had thereby obtained access to local trade in exchange for offering the king and his people military protection. When the Portuguese had attacked Johor, the Dutch had provided military assistance to their ally and seized the Santa Catarina.13 For Grotius, the alliance with the king of Johor thus served as an important argument for justifying the seizure of the Santa Catarina as a ‘just prize’ taken in a ‘public war’.14

As Martine van Ittersum and Richard Tuck have pointed out, Grotius’s claims in De iure praedae regarding the right of the Dutch to enter into military alliances with non-Christian rulers such as the king of Johor were not uncontroversial.15 The traditional view was that military alliances with non-Christians were permissible only in case of self-defense: a Christian nation could thus use the aid of non-Christian allies to protect itself from (impending) attack, but only in case of ‘imminent necessity’, not otherwise.16 By contrast, Grotius claimed that the Dutch had a right to wage a public war against another Christian nation (e.g., the Portuguese) on behalf of a non-Christian ally (e.g., the king of Johor), even if they were not themselves attacked. He also maintained that they had seized the Santa Catarina on behalf of the king of Johor, who had ceded his right to the prize to the voc in gratitude of its assistance.17 In the eyes of Grotius’s contemporaries, these were startling claims, as they implied that the Dutch had more in common with ‘infidels’ than with their fellow-Christians. According to Van Ittersum, it is therefore likely that Grotius wrote De societate to support the conclusions he had presented in De iure praedae: his aim was to demonstrate that the right to enter into military alliances with non-Christians originated from natural law, and more specifically, from the natural law of non-offensiveness (i.e., the duty not to harm others without cause), which applied irrespective of religious belief. Like Borschberg and Tuck, Van Ittersum emphasizes the similarities between De iure praedae and De societate: in both texts, Grotius concluded that Christians had a natural right to enter into military alliances with non-Christians to protect each other from harm, and he evoked the same sources and examples to prove his conclusion.18

In view of these similarities, the interpretation proposed by Borschberg, Van Ittersum and Tuck that De societate should be read alongside De iure praedae does indeed seem plausible. However, it should also be noted that De societate is a rather abstract treatise dealing with all kinds of partnerships between Christians and non-Christians, not only military alliances, but also, for instance, private associations, such as commercial contracts, marriages, and relations of servitude. Moreover, in his treatise, Grotius never explicitly refers to the East Indies or the voc. Instead, he discusses examples of interreligious partnerships that are mentioned in the Bible and other sources (e.g., Roman and canon law). In this regard, De societate stands in sharp contrast to De iure praedae, in which Grotius explicitly defended the voc’s policies in the East Indies, focusing on particular alliances with non-Christian rulers such as the king of Johor.19 Of course, the fact that Grotius does not mention the voc’s alliances in De societate does not mean that it is unrelated to the East-Indian context.20 However, it does raise the question why Grotius refrained from discussing the voc’s alliances explicitly. As we will argue below, he probably intended to write a more general treatise on public and private partnerships between Christians and non-Christians, which pertained not only to the East-Indian context, but also to domestic debates about the legal position of non-Christians in the Dutch Republic. There are, for instance, important similarities – both in terms of content and use of sources – between De societate and the Remonstrantie of 1615, in which Grotius proposed a set of legal regulations for Jews residing in Holland and West-Friesland.

As our analysis of De societate will show, no sharp boundaries can be drawn between Grotius’s views on partnerships with non-Christians in the international and domestic contexts. Indeed, as we will explain in this introduction, ideas about military alliances with non-Christians which Grotius developed in view of the East-Indian context were in fact closely related to his thoughts about legal partnerships with religious minorities living in Christian states and vice versa. For instance, the right to protect non-Christians from harm, which Grotius discussed in De societate, could simultaneously serve as an argument for overseas expansionism (e.g., protecting East-Indian nations from Portuguese aggression) and as a justification for religious toleration (e.g., protecting non-Christian minorities, who had fled from religious persecution and taken refuge in the Dutch Republic). In our view, Grotius’s De societate should thus be interpreted as a general treatise on legal partnerships between Christians and non-Christians that relates both to the voc’s policies of alliance-making in the East Indies and to debates about the rights of religious minorities in the Dutch Republic itself.21 More specifically, we will argue that Grotius’s treatise can be regarded as an important step in the development of his ideas about legal relations with non-Christians, starting with his early reflections in De iure praedae on alliances with non-Christian rulers in the East-Indian context, continuing with his proposal in the Remonstrantie for legal regulations for Jews in the Dutch Republic, and culminating in his general conclusions in De iure belli ac pacis regarding partnerships with ‘strangers of the Christian religion’ in both European and non-European contexts.

Before presenting Grotius’s De societate, we would like to emphasize that our edition of the text should be considered a working document. This means that we did not intend to give definitive answers to all the questions raised by Grotius’s manuscript and that further research will be necessary. In particular, we have not been able to solve all the reading problems in the manuscript. We have indicated possible alternative readings in notes to the transcription of the Latin text. Moreover, translating the text into English often required us to make interpretative choices, which are of course open to discussion. Hence, we invite other researchers to further improve our transcription and translation of the text, which is possible due to the availability of excellent, high resolution pictures of the manuscript itself on the website of Leiden University Library.22 Moreover, in footnotes to the Latin text, we have focused on parallels with writings of Grotius in which he expressly discusses legal relations with non-Christians, such as De iure praedae, the Remonstrantie, and De iure belli ac pacis, but we have not systematically looked for parallels with his other writings. In particular, we have not compared the text of De societate with his later theological writings, even though this might be a promising field of research, as Grotius frequently discusses biblical examples in De societate. Moreover, we have not been able to identify all the sources to which Grotius refers in De societate. To mention the most intriguing example: in his reading notes on fol. 316 (2)v, Grotius refers to ‘c. 6 de Manubiis’. We suspect this might be a reference to chapter 6 of De iure praedae, although this cannot be determined with certainty.23 So, the analysis of Grotius’s De societate we present in this introduction should not be seen as the end, but rather as the continuation of a scholarly debate about the text’s meaning and significance. In particular, we hope that our edition of Grotius’s text will stimulate new discussions about Grotius’s views on legal partnerships with non-Christians, both in the international and domestic contexts.

2 History and Transmission of the Manuscript

The manuscript of De societate was originally part of a larger volume containing manuscripts and working papers of Grotius. The original folio numbers, written in Grotius’s hand, are still visible at the top of the (uneven) pages. As Martine van Ittersum explains in a forthcoming monograph, Grotius probably had his manuscripts bound in volumes when he was living in exile in Paris.24 In May 1619, he had been convicted for high treason by a special court of the Estates General and sentenced to lifelong imprisonment at Loevestein Castle.25 Following his arrest and conviction, his books and working papers were confiscated and removed from his house in Rotterdam.26 In March 1621, Grotius escaped from Loevestein, hidden in a bookchest. After his spectacular escape, he found a refuge in Paris. In the meantime, Grotius’s wife Maria van Reigersberch lodged several unsuccessful appeals to the Court of Holland and Zeeland against the confiscation of her husband’s possessions, until her request was partially granted in 1625 and then fully in 1630.27 It would take several more years before Grotius finally received his books and working papers in Paris. By that time, he had become Swedish ambassador at the court of Louis xiii. According to Van Ittersum, Grotius probably sent his working papers to the binder in the late 1630s or early 1640s. Being an ambassador, he had both the means and need to systematically order his personal papers.28

It is unclear whether Grotius had the manuscript of De societate at his disposal when he wrote his magnum opus De iure belli ac pacis in the early 1620s in Paris. As we have seen, his possessions, including his manuscripts, had been confiscated in May 1619, and they were only partially returned to him after September 1625, when De iure belli ac pacis had already appeared in print. However, after his arrest in August 1618, Grotius’s father Jan de Groot had managed to remove some manuscripts from his son’s house in Rotterdam.29 Moreover, in June 1619, his wife Maria obtained permission to remove thirty-one books, including ‘two books written with the hand in folio’, and send them to Loevestein.30 It is, of course, possible that these included the manuscripts of De iure praedae and De societate. After his escape to Paris, Grotius repeatedly requested his family members to send his manuscripts to Paris. In the Spring of 1622, he specifically instructed his brother-in-law Nicolaes van Reigersberch to send him the manuscripts of his Annales et historiae (Annals and Histories of the Dutch Revolt) and his Defensio capitis quinti maris liberi (Defense of the Fifth Chapter of Mare liberum).31 Moreover, in a letter of 20 June 1622, Grotius thanked his brother Willem de Groot for sending him Vossius’s copy of Stobaeus’s Eclogae physicae as well as ‘those childish works (illis puerilibus) of which we had great need’.32 According to Peter Haggenmacher, the puerilia of the letter to Willem de Groot probably referred to the manuscript of De iure praedae.33 It should be noted, however, that Grotius used the word puerilia in the plural: he probably referred to multiple manuscripts, and it is possible that these included both De iure praedae and De societate.34 However, we cannot know for certain to which manuscripts Grotius referred in his letter, and hence, we simply do not know whether he had the manuscripts of De societate and De iure praedae at his desk when he wrote De iure belli ac pacis. We therefore agree with Van Ittersum that this can only be determined through a systematic comparison of the quotations and marginal references in these texts and in the 1625 and 1631 editions of De iure belli ac pacis.35

After Grotius’s death in 1645, his manuscripts remained in the possession of his direct descendants for more than two centuries. When an inventory was made in 1778, it listed no less than 32 volumes of manuscripts and working papers (both of Grotius himself and his son Pieter), which were preserved in a ‘big square white chest’.36 As Van Ittersum explains, two volumes contained Grotius’s papers on the East Indies as well as his early writings on natural law. Volume 18 contained documents relating to Grotius’s advisory work for the Dutch East India Company: it consisted of reports, letters, petitions and other documents which Grotius had either received from or prepared for the Company in the period between 1604 and 1615.37 Volume 24 contained the manuscript of De iure praedae, along with other legal and political treatises from an early phase of his career, including the Theses xi, Theses lvi, De pace and De societate publica cum infidelibus.38 The contents of this volume have been reconstructed by L.J. Noordhoff based on the original foliation: De societate was placed directly after a hand-written memorandum (not in Grotius’s hand) on the legal grounds that could potentially be presented by the Spaniards for declaring the peace between the Northern Netherlands and the archdukes Albert and Isabella of Austria invalid (fol. 308–313) – a document that was probably written in 1607 or 1608.39 Directly following De societate was a collection of reading notes and comments in Grotius’s hand on Greek and Roman law, entitled Ius Atticum et formulae et sententiae (fol. 319–344).40 Interestingly, the same volume also contained Grotius’s Remonstrantie or draft regulations for Jews residing in Holland and West-Friesland of 1615 (fol. 1–34) as well as several other documents pertaining to the legal position of Jews in the Dutch Republic (fol. 198–211).41

In the second half of the nineteenth century, the collection of Grotius’s manuscripts was still in the possession of his family. It was inherited by Hugo Cornets de Groot (1783–1864), a low-ranking tax collector from the village of Cuyck. After his death in 1864, Grotius’s manuscripts were appropriated by his landlord, Jean-Baptiste Regouin, who used them to pay off his debts to Christian Snelleman, a tobacco merchant from Rotterdam. It was Snelleman who decided to offer the papers for sale at a public auction, organized by Martinus Nijhoff in The Hague.42 Nijhoff hired the eminent bibliographer Pieter Anton Tiele to provide a description of the collection for the auction’s catalogue. By that time, the volumes with Grotius’s working papers were still in their original bindings. However, Nijhoff decided to have the manuscripts taken from their bindings, so that they could be offered as multiple lots (a strategy meant to increase the auction’s profits).43 At Nijhoff’s request, Tiele disassembled several volumes and described their contents at document level.44 In advance of the auction, Nijhoff reached out to potential buyers, offering a large collection of Grotius’s manuscripts (that had originally been part of volume 24 in the inventory of 1778) to the University of Leiden. As Van Ittersum explains, the Law Faculty was particularly determined to acquire manuscripts that could raise Grotius’s profile as a ‘founder of modern international law’.45 Due to a prior agreement with Nijhoff, it succeeded in buying the entire collectanea juridica et politica (lots 72–78) for 261 guilders. It contained the manuscript of De iure praedae (lot 72), the Remonstrantie and other documents relating to Jewish rights (lots 73–75), as well as a collection of about 450 pages of early legal and political treatises, including the manuscript of De societate publica cum infidelibus (lot 78).

3 Description of the Manuscript

The manuscript of De societate consists of six sheets, numbered fol. 314–317.46 Two sheets are unnumbered. One of these was later inserted between folios 316 and 317; we will refer to it as fol. 316 (2). The other unnumbered sheet can be found at the end of the manuscript and has text only on the verso side; it will be referred to as fol. 318v. The title of Grotius’s treatise – De societate publica cum infidelibus – is mentioned twice, on fol. 314r and on fol. 318v. All in all, De societate consists of six pages of densely written text and another four pages with reading notes. All folio sheets are folded in the middle. The main text can be found on the right side of the page, with references to the sources on the left side. As Borschberg has pointed out, Grotius adopted the same working method in other manuscripts, for instance, in his Theses lvi, where he also wrote the main text on the right side of the page, leaving the left side open for additions and references to sources.47 The main text of De societate consists of six pages and can be found on fol. 314, 315 and 317. Apart from the main text, there are four pages with reading notes, which can be found on fol. 316r, 316 (2) and 318v. The reading notes are written in two columns, on the left and right side of the page. On fol. 316 (2)v, the notes are written first in two columns, then across the entire page, and then again in two columns.

Grotius inserted references to the sources he used in the main text, in marginal notes to the main text (on left side of the page) and in reading notes (on separate pages). Sometimes the same sources are mentioned at different places, allowing the reader to connect the main text to the reading notes. For instance, in the main text on fol. 314v, Grotius presents his first conclusion that ‘private and public persons’ may enter into a ‘pact’ (foedus) with non-Christians with the aim not to harm one another. To support his conclusion, he refers to the biblical examples of the alliances of Abraham and Isaac with the Philistine king Abimelech, of Jacob with his father-in-law Laban, and of David and Solomon with Hiram, the king of Tyre, inserting references to the relevant passages in Genesis and Samuel.48 These same examples are also mentioned in the reading notes on fol. 316 (1)r, with short descriptions of their content. For instance, the alliance between Abraham and Abimelech is here characterized as an alliance ‘of non-offensiveness and of cultivating friendship’.49 However, not all the sources mentioned in the reading notes can be found in the main text, and conversely, not all sources cited in the main text reappear in the reading notes. For instance, in the main text on fol. 315r, Grotius discusses several philosophical sources, including Cicero’s De officiis and Seneca’s De beneficiis, which are not mentioned in the reading notes. Conversely, the references to Alberico Gentili’s De iure belli in the reading notes (fol. 316 (2)v) do not reappear in the main text. Hence, it is not always possible to relate the main text to the sources mentioned in the reading notes.

In our view, there are several reasons why De societate should probably be regarded as a draft. First of all, the manuscript is written in Grotius’s own hand. There are several examples of manuscripts of Grotius of which we have clean copies in the hand of a clerk, sometimes with revisions made by Grotius himself.50 However, in this case, no scribal copy has been preserved and we only have Grotius’s autograph. Secondly, the content of De societate suggests that it was not a definitive version. It describes the skeleton structure of Grotius’s argument, consisting of premises, propositions and conclusions. While the first three propositions are accompanied by lengthy explanations, later propositions and conclusions lack such explanations. This suggests that Grotius started writing out the text of De societate, but left it unfinished. A third reason for regarding the text of De societate as a draft is that often words or sentences have been crossed out or inserted. Moreover, the text contains some open variants, that is, alternative formulations about which Grotius still had to take a decision.51 To give one significant example of a later insertion: in the title of the manuscript on fol. 314r the word publica is placed above the line. This suggests that the title was originally De societate cum infidelibus, ‘On Partnership with Unbelievers’, and that Grotius at a later stage added the word publica to the title: De societate publica cum infidelibus, thereby clarifying that the main focus of his treatise was on public partnership (e.g., treaties and alliances) between Christians and non-Christians. The reason for this shift of focus can perhaps be explained in light of the historical circumstances which led Grotius to write his treatise.

4 Dating the Manuscript

As noted above, Borschberg believed De societate to be an early work of Grotius, which was written in the first decade of the seventeenth century.52 The content and physical aspects of the manuscript, as well as the manner in which it has been transmitted, allow us to propose a more specific dating, viz. between 1606 and 1609. As we have seen, the manuscript of De societate was originally part of a volume (listed as volume 24 in the inventory of 1778) containing legal and political treatises from an early phase of Grotius’s career. The most extensive treatise in this volume was De iure praedae, which was written between 1604 and 1606, and thoroughly revised in 1607 and 1608.53 It was bound together with other manuscripts dating from the first decade of the seventeenth century. For instance, the manuscript relating to the peace negotiations between the Northern Netherlands and archdukes Albert and Isabella of Austria, which can be found directly before De societate in the volume (fol. 308–313), dated from 1607 or 1608.54 Placed just before it was the manuscript of De pace (fol. 302–307), which probably originated from the same period and also related to the peace negotiations.55 The volume also contained several other treatises from an early phase of Grotius’s career. For instance, his Commentarius in theses xi (fol. 276–283) was probably written between 1603 and 1608,56 while his Theses lvi (fol. 287–290) may have been produced a bit earlier, between 1602 and 1605.57 However, the volume also included documents from the following decade, for instance, the Remonstrantie (fol. 1–34), which was written in, or shortly after, 1615.58

The sources to which Grotius refers in De societate allow us to propose a more precise dating of the manuscript. In the reading notes on fol. 318v, Grotius refers to a treatise on Mosaic law by Wilhelmus Zepperus. He gives a specific page number which corresponds to the relevant chapter in the 1604 edition of Zepperus’s work.59 However, the reference to Zepperus can be found on the last page of De societate (fol. 318v) and it may have been added at a later stage, after Grotius had completed the main text. The text also contains two other references to an even later work, which may serve as a terminus post quem for dating the manuscript. In a marginal note to the main text on fol. 315v, Grotius mentions Josephus Justus Scaliger’s Animadversiones in Eusebium, of which the first edition appeared in 1606.60 Grotius’s reference to Scaliger’s work is lapidary: no explanation is added. The work is mentioned in relation to Grotius’s proposition that marriages between Christians and non-Christians should generally be condemned (since the main purpose of marriage is the education of children to the glory of God, which, according to Grotius, is ‘not a little hindered’ by such marriages).61 A second reference to Scaliger’s Animadversiones can be found on fol. 317r, in a marginal note to Grotius’s fifth conclusion that Christians and non-Christians can live together in one state.62 It is of course possible that Grotius added these marginal references to Scaliger at a later stage, after completing the main text. No references to later works can be found in the manuscript. This means that Grotius probably wrote De societate in or after 1606.

Unfortunately, we have not been able to find a terminus ante quem for the manuscript of De societate. The text does not contain any references to historical events which would make it possible to determine the latest date when it could have been written. However, there is another indication that we are dealing with a text that was probably written in, or not long after, 1606. The paper of fol. 316 (2) contains the watermark of a grape with a diamond shape cluster with a horn-shaped stem. This paper was produced by the papers mill of Troyes in France.63 The same grape watermark can be found on a draft letter which Grotius wrote on behalf of the Dutch East India Company to the king of Ternate.64 This letter was probably written between the summer and winter of 1606.65 The watermark can also be found on Grotius’s draft of De pace, which, as we have seen, was written in the context of the peace and truce negotiations, between 1607 and 1609.66 The fact that Grotius used the same paper for these manuscripts may serve as a rough indication that they were written around the same time. Of course, watermarks cannot give us any certainty with regard to the dating of manuscripts. It is, for instance, possible that Grotius used the same paper containing a particular watermark for several years. However, the paper containing the watermark of the diamond shape cluster was relatively inexpensive: Grotius seems to have used it only for drafts and reading notes.67 It is, therefore, not very likely that he kept a stock of this inexpensive drafting paper for many years. This suggests that De societate was written either in 1606, or shortly after 1606, but not many years later.68

In the period between 1606 and 1609 (when a truce with Spain was concluded), Grotius had good reasons to be interested in the topic of De societate, and more specifically, in its main question if, and to what extent, it was permissible for Christians to enter into public partnerships with non-Christians. In 1606, the voc directors had entrusted him with the task of writing a series of letters to Asian and East Indian rulers to reconfirm their ‘contracts of alliance’ (contracten van verbondt).69 In previous years, the voc had entered into alliances and treaties with a number of Asian and East Indian rulers, including the ‘emperor’ of Malabar’, the ‘kings’ of Johor, Tidore and Ternate, and the ‘lords’ of Ambon and the Banda islands.70 In his letters to these rulers, Grotius defended the voc’s alliances: he claimed that the Dutch had united their trading companies, not only to better protect their own rights (e.g., to free navigation and trade), but also to ‘liberate the princes and nations of the East Indies from the tyranny’ of the Spaniards and Portuguese.71 In his letters, Grotius reminded the East Indian rulers of their obligations as allies of the Dutch, urging them to refrain from trading with other European nations. If the East Indian rulers continued to deliver their spices to other nations, then the Dutch would no longer be able to finance the war fought on their behalf against the Iberian enemy.72 Grotius’s defense of the voc’s alliances with East Indian rulers was, of course, not uncontroversial. A key question was whether alliances with non-Christian rulers could be legitimate if they were aimed against other Christians (such as the Spaniards and the Portuguese). As we will see, this would also be one of the main questions in De societate publica cum infidelibus.

In the winter of 1607–1608, negotiations started for a peace or truce agreement between the Dutch Republic and Spain. Grotius was asked by the voc directors to work out a strategy for the Dutch negotiators, aimed at safeguarding the Company’s strategic interests in Asia and the East Indies.73 He prepared two drafts of a memorandum, in which he sketched three possible scenarios: under the first scenario, both parties would be free to trade in the East Indies and hostilities would cease. According to the second, the Dutch would agree to withdraw from the East Indies and the voc would end its activities there in a few years. The third scenario was that notwithstanding the peace in Europe, the war in the East Indies would be continued.74 As Grotius suggested, the first scenario was the preferred outcome, but if it would not be accepted, then the Dutch negotiators should seek to achieve the more realistic third scenario: a treaty permitting a continuation of the war beyond the Line (i.e., the tropical Line of Cancer). In his memorandum, Grotius expressly referred to the voc’s ‘correspondence, friendships and alliances’ with East Indian rulers.75 As Grotius explained, the Company had entered into these alliances on behalf of the Dutch Estates General, and these rulers could not be left to the mercy of the Spaniards and Portuguese without seriously damaging the Dutch reputation.76 In February 1608, the voc directors enthusiastically approved Grotius’s memorandum and the Estates General adopted it as its official negotiating position.77 In accordance with Grotius’s proposal, the Dutch and Spanish rights in the East Indies would be determined on the basis of the legal principle of uti possidetis: parties would continue to possess those territories they already possessed at the moment the truce would come into effect.78 In April 1608, the voc directors therefore sent instructions to their officials overseas to enter into as many treaties and alliances with East Indian rulers as possible before the truce would take effect.79

It is not unlikely that Grotius wrote De societate between 1606 and 1609. In these years, the issue of the legitimacy of alliances with non-Christian rulers in Asia and the East Indies was particularly high on the agenda of both Grotius and the voc directors. Grotius’s thesis in De societate that both ‘private and public persons’ were permitted to enter into alliances with non-Christians with the aim of protecting each other from harm could thus serve as a justification for the voc’s policy of allying with East Indian rulers against the Spaniards and Portuguese.80 It is true that Grotius had already defended the voc’s alliances as early as 1604, when he had argued in De iure praedae that the Company was waging a ‘public war’ against the Portuguese on behalf of its non-Christian ally, the Sultan of Johor.81 But as we have seen, the references to Scaliger’s Animadversiones suggest that Grotius wrote De societate somewhat later, that is, in or shortly after 1606. By that time, Grotius had become personally involved in building the voc’s network of alliances in the East Indies. Perhaps Grotius’s letters to East Indian rulers prompted him to write De societate to develop his ideas about interreligious alliances in a more systematic manner: the main question was no longer whether these alliances were permissible at all, but rather under what legal conditions they were justified. The treatise may also have been written in conjunction with the diplomatic initiative of April 1608, and the Company’s policy to conclude as many treaties and alliances with East Indian rulers as possible before the truce with Spain would take effect. Although it remains uncertain, the combination of factors – references to particular sources, the diamond shape grape watermark, the historical context of the peace and truce negotiations – all point to a dating between 1606 and 1609.

5 Explaining the Title

Before analyzing the content of Grotius’s treatise, we should first consider its title: De societate publica cum infidelibus. Borschberg translates it as ‘Of Public Society with Non-Christians’.82 Other scholars have left the Latin title untranslated.83 The word societas is particularly difficult to translate. In Grotius’s time, societas did not have the same connotations it has today, of a community of people sharing the same laws and customs. Instead, for Grotius, societas also referred to relations between communities (e.g., ‘nations’ or religious communities), which often had their own customs and laws, while also sharing certain laws (e.g., those of natural law and the ius gentium). The legal term societas originated from Roman private law: it was one of the consensual contracts, whereby two or more persons agreed to co-operate for a common purpose (often a business association).84 The more specific term societas publica was unknown to Roman law: what came closest was societas publicanorum, an association of tax collectors.85 It was Cicero who first used the private law concept of societas as a model for understanding public associations. Thus, in De re publica, he defined the state (res publica) as ‘an assemblage of people in large numbers associated [sociatus] in an agreement with respect to justice and a partnership for the common good’.86 Building on Roman law and Cicero, medieval jurists and theologians developed the concept of societas publica. For instance, in his Liber contra impugnantes Dei cultum et religionem (ca. 1256), Thomas Aquinas distinguished between a societas privata, an association for private purposes (e.g., a business association), and a societas publica, which was created when men assembled to establish a state.87

Like Cicero and Aquinas, Grotius used the term societas publica to define the state (res publica): he concluded that ‘the highest public partnership is the union of the state (summa publica societas est unio reipublicae)’.88 However, he also employed the term societas publica to refer to treaties and alliances between states, using the words societas and foedus as synonyms.89 As we have seen, in De societate he discussed not only ‘public societies’, but also ‘private societies’, such as commercial contracts, marriages, and relations of servitude (e.g., relations between masters and slaves or servants). On the first page of his treatise, he explicitly referred to Aquinas’s distinction between societas privata and societas publica, that is, between private and public societies.90 However, he also explained that ‘in both cases the principle [was] almost the same [in utroque ferme eadem est ratio]’.91 For Grotius, the distinction between ‘public’ and ‘private’ was not absolute,92 so that, for instance, public alliances with non-Christians could be concluded by private actors (e.g., the voc as a private trading company) on behalf of a public authority (e.g., the Dutch Estates General).93 As Grotius explained in De societate, ‘public societies’ were governed by ‘almost the same’ principle as ‘private societies:’ for instance, alliances between states and contracts between private parties were in general permissible, provided that they did not undermine the unity of the state or the Christian religion.

As other scholars have pointed out, the concept of societas would take center stage in Grotius’s later work.94 Thus, in De iure belli ac pacis (1625), Grotius famously defined human nature itself in terms of an ‘impelling desire for society [appetitus societatis]’, which he later identified with the Stoic doctrine of ‘sociability [οἰκείωσις]’.95 He explained that man’s ‘desire for society’ was to be understood in a Stoic sense as a ‘certain inclination [of man] to live with those of his own kind, not in any manner whatever, but peaceably, and in a community regulated according to the best of his understanding’.96 From this ‘maintenance of social order [societatis custodia]’, to which man was by nature inclined, the main principles of the ‘law properly so called’, that is, natural law, could be rationally deduced. These included the principle that one should abstain from taking away someone else’s property, that one should restore what belonged to another (including the profit one had received from it), that one should fulfill one’s promises, that one should compensate for the losses incurred by one’s fault, and that one should inflict punishment on others if deserved.97 For Grotius, these fundamental principles of natural law served as the foundation not only of private law (e.g., the law of property, contracts and torts), but also of public law (e.g., constitutional law, criminal law and public international law). In De societate, Grotius first developed the term societas as a general legal concept underlying private and public partnerships with non-Christians: in De iure belli ac pacis, it came to be identified as the main source of natural law itself.

Just as complex as Grotius’s use of the term societas publica was his use of the term infideles. Who were the ‘infidels’ to whom Grotius refers in the title of his treatise? As we have seen, Borschberg translates De societate publica cum infidelibus as ‘Of Public Society with Non-Christians’. He thereby suggests that it primarily refers to non-Christians, that is, to those who do not believe in Christ or Christian doctrine. However, as Borschberg himself notes, Grotius not only discusses partnerships with non-Christians, but also with ‘heretics [haeretici]’. Indeed, throughout the text, he uses the standard expression ‘societas cum infidelibus aut haereticis [society with infidels or heretics]’, suggesting that non-Christians and heretics belong to the same general category of non-believers.98 As Grotius specifies, there are two kinds of ‘infidels’, namely ‘those who never belonged to the Church’, and ‘those who departed from it, or are expelled by an ecclesiastical judgement’.99 We may assume that the first category includes Jews, Muslims and ‘pagans’.100 Grotius may have thought of the Muslim populations of the East Indies as well as non-Christian minorities (e.g., Jews) in the Dutch Republic itself. The second category relates to heretics and apostates: it is uncertain whom Grotius has in mind, as he does not give specific examples. From the perspective of some of the Catholic (and Counter-Reformatory) sources he uses in De societate (e.g., Sylvester, Cajetan and Vitoria), Dutch Protestants could, of course, themselves be regarded as heretics. In the context of the peace negotiations with Spain, Grotius’s aim may have been to convince international audiences that a peace treaty with the Dutch was binding, even if the Spaniards regarded them as heretics.101 Interestingly, elsewhere in De societate, Grotius refers to a third category, of those who ‘wish to be considered as faithful [ii qui Fideles haberi velint]’, which should probably be read as a pejorative reference to Catholics (e.g., the Spaniards and Portuguese).102

Grotius’s understanding of these distinctions seems to have been informed by Aquinas’s Summa theologiae, which is cited on the first page of De societate.103 Aquinas had distinguished between three types of unbelief. First, there were the ‘pagans or heathens [pagani sive gentiles]’, that is, those who had never heard the Gospel. Second, there were the ‘Jews [Iudaei]’, who had heard the message of Christ, but did not believe that he was the redeemer. The third category consisted of ‘heretics [haeretici]’, who had accepted that Christ was the redeemer, but distorted his message.104 Addressing the question whether ‘the unbelief of pagans or heathens [was] graver than other kinds’, Aquinas emphasized the importance of free will in accepting or rejecting the message of Christ.105 Those who had intentionally rejected the message of Christ sinned more grievously than those who had never heard it, while those who had accepted his message, but then distorted it, sinned more grievously than those who had not accepted it.106 Aquinas concluded that ‘the unbelief of heretics, who confess their belief in the Gospel, and resist that faith by corrupting it, is a more grievous sin than that of the Jews, who have never accepted the Gospel faith. Since, however, they accepted the figure of that faith in the Old Law, which they corrupt by their false interpretations, their unbelief is a more grievous sin than that of the heathens, because the latter have not accepted the Gospel faith in any way at all’.107 In other words, according to Aquinas, the sins of the pagans or heathens, who had never heard the Gospel, were less grievous than those of the Jews, who had heard the Gospel but rejected it, while the sins of the Jews were less grievous than those of the heretics, who had distorted the message of Christ. As Aquinas concluded, ‘speaking absolutely, the unbelief of heretics [was] the worst’.108

In De societate, Grotius seems to share Aquinas’s conclusion that the unbelief of heretics is worse than that of pagans and Jews. While Christians are generally allowed to live together with pagans and Jews, Grotius warns that they ‘must abstain from intimate relations and social intercourse with those who have fallen from the Church, or have been condemned by its judgement: because this is so arranged for a special reason, that they should return to shame and repentance’.109 However, instead of Aquinas’s threefold distinction between ‘pagans’, ‘Jews’ and ‘heretics’, Grotius presents a twofold distinction between ‘those who never belonged to the Church’ (i.e., non-Christians) and ‘those who departed from it, or are expelled by an ecclesiastical judgement’ (i.e., heretics or apostates).110 Crucially, in Grotius’s twofold distinction, the Jews no longer constitute a separate category, but they are now grouped together with other non-Christians, including those who have never heard the Gospel (Aquinas’s ‘pagans or heathens’). By placing ‘Jews’ and ‘pagans’ in the same category of ‘those who never belonged to the Church’, Grotius implicitly introduces a more positive understanding of the Jews: like pagans who have never heard the message of Christ, the Jews may not be punished for their ignorance. Indeed, in some respects, the Jews seem to be placed above other non-Christians. This is the consequence of Grotius’s focus on examples from the Old Testament, in which the Jews appear as God’s chosen people and as an example for the believers. Grotius would further develop these more positive views of the Jews in his Remonstrantie, where he observed that ‘[t]he pagans have false Gods. The Mohammedans have a false Prophet. The Jews at any rate have the true God and the true Prophets’.111

6 Structure of the Text

De Societate begins with a short introduction, in which Grotius presents his main question: ‘if and to what degree it be allowed to Christians to enter into a partnership with non-believers, or even heretics’.112 As Grotius explains, this question is old, yet still frequently discussed in his own time. The sources to which Grotius refers in the main text and reading notes indicate that the question is indeed very old: they include Scripture, Roman law (e.g., the Codex Theodosianus), medieval theology and canon law (e.g., Gratian, Aquinas, Panormitanus, and Oldradus) as well as the later scholastic tradition (e.g., Cajetan, Sylvester, and Vitoria). Grotius also refers to legal and theological sources from his own time (e.g., Gentili, Zepperus and Scaliger), albeit less frequently. In the introduction of De societate, he observes that in these sources, the question if and to what degree public partnerships with non-believers are allowed has been considered primarily on the basis of exempla, while the underlying principles or reasons for particular solutions have been insufficiently explained. It is true that many of the sources mentioned in De societate (in particular, medieval scholastic sources) are casuistic, in the sense that concrete cases and examples are discussed to justify particular solutions: examples of ‘societies’ with non-believers are thus discussed in glosses or commentaries on questions pertaining, for instance, to ‘unbelief’, ‘war’, ‘charity’, or ‘marriage’.113 Unlike his predecessors, Grotius wants to address the question regarding the permissibility of ‘public societies’ with non-believers in a more comprehensive and systematic (i.e., syllogistic) manner.

Apart from the brief introduction, the text of De societate consists of ten premises, nine propositions and nine conclusions. Grotius suggests that the propositions are rationally deduced from the premises and that the conclusions follow logically from the premises and propositions. For instance, after presenting his first proposition, he adds the words: ‘ex primo praemisso’, implying that this proposition derives ‘from the first premise’.114 He then continues with a brief explanation, before adding the words ‘[u]nde sequitur conclusio’, indicating that the conclusion follows from his first proposition.115 According to the first proposition, Christians have a duty to refrain from harming non-believers and heretics. As Grotius explains, this proposition follows from the first premise that an ‘error of faith’ does not change the obligations that originate from the law of nature. The proposition then leads to the first conclusion that ‘it is permissible for both private and public persons to enter into a pact with non-believers or heretics not to harm one another’.116 According to Grotius, this conclusion follows logically and thus necessarily from his first premise and proposition. However, the relationship between premises, propositions and conclusions is not always as straightforward and logical as in the discussed example. Often conclusions are not placed directly behind the relevant propositions,117 and sometimes they even precede them.118 Moreover, it is not always certain from which premises particular propositions are derived, as the relevant premises are not always indicated by Grotius. For this reason, the intricate system of premises, propositions and conclusions remains difficult to decipher.

The premises Grotius presents in De societate are in general relatively short; in most cases, they consist of a single sentence. Sometimes, they contain distinctions that are relevant for analyzing the main question (e.g., between those who belong to the church and those who do not), which are further developed in the propositions and conclusions.119 Premises 7 to 10 are particularly short; they seem to be hastily added and contain distinctions relating to the different types of infidels and partnerships. By contrast, the propositions and conclusions tend to be more extensive: they are followed by (sometimes lengthy) explanations, in which relevant examples and sources are discussed. Moreover, Grotius often adds ‘limitations’ or ‘amplifications’ to his propositions and conclusions, which are indicated with the abbreviations ‘lim[itatio]’ and ‘ampl[ificatio]’ and separately numbered. For instance, his second proposition is followed by one amplification and two limitations. As Grotius indicates, these limitations and amplifications follow from the premises.120 Often a particular proposition is developed on the basis of one premise and then limited on the basis of another. An example is the second proposition, according to which the faithful are allowed to do good to non-believers.121 This proposition is first amplified on the basis of the first premise, in the sense that depending on the circumstances, it is not only allowed (i.e., a right), but also necessary (i.e., a duty) to do good to non-believers.122 The proposition is then limited on the basis of the second premise, in that preference should be given to the faithful over non-believers and heretics, and that no harm may be brought to the Christian religion.123

The system of premises, propositions and conclusions of De societate is in some respects comparable to the axiomatic-deductive system which Grotius first used in De iure praedae and further developed in De iure belli ac pacis.124 As Grotius explained in the prolegomena of De iure praedae, just as mathematicians usually begin their demonstrations by presenting certain axioms on which all persons can easily agree, jurists should preferably begin by outlining certain laws and rules of the most general nature, which no rational person can disagree with.125 From these general laws, the main conclusions can be rationally deduced. In his prolegomena, Grotius presents a framework consisting of nine rules and thirteen laws, from which he derives his conclusions. One of these laws is the so-called law of non-offensiveness: ‘let no one inflict injury upon his fellow’.126 This law reappears in the form of a proposition in De societate, where it is applied to non-Christians and heretics: ‘To refrain from harming non-believers and heretics in general is not only permissible for Christians, but also necessary’.127 Another law presented in De iure praedae is the law of (individual and collective) protection: ‘Individual citizens should not only refrain from injuring other citizens, but should furthermore protect them, both as a whole and as individuals’.128 This law seems to be related to the amplification of the second proposition of De societate, according to which Christians should not only refrain from harming non-Christians, but should also provide assistance to them, especially when they ask for help.129 In both De iure praedae and De societate, these laws and propositions then serve to support the conclusion that it is permissible for Christians to enter into alliances with non-Christians to protect each other from harm.130 According to Grotius’s axiomatic-deductive system, this conclusion follows logically, and thus necessarily, from the premises and propositions. However, as our analysis of the main text of De societate will show, the relations between premises, propositions and conclusions are not always as logical and necessary as Grotius’s axiomatic-deductive system suggests.

7 Analysis of the Text

7.1 The Ten Premises

Addressing the question ‘if and to what degree it be allowed to Christians to enter into a partnership with non-believers, or even heretics’, Grotius begins by presenting ten premises, from which his propositions and conclusions are derived. According to his first premise, a distinction should be made between two types of ‘societies:’ on the one hand, the community between men that originates from nature, which is governed by primary and secondary natural law, and, on the other, the ecclesiastical community, which is governed by divine law and the law of the church. The concepts of ‘primary’ and ‘secondary natural law’ had been developed by medieval jurists and theologians on the basis of Roman law: while primary natural law governed relations between all living (i.e., human and non-human) beings, secondary natural law applied only to human beings endowed with reason.131 Grotius had first used these concepts in De iure praedae, in which he identified secondary natural law with the primary law of nations, that is, the body of legal norms that followed from natural reason and that applied to all nations.132 In the first premise of De societate, Grotius explains that an ‘error of faith’ (error in fide) does not change ‘those things that pertain to natural law and the protection of [the] universal community [of mankind]’.133 In this context, he refers to Aquinas, who had argued that ‘divine law which is the law of grace does not do away with human law which is based on the law of natural reason’.134 For Grotius, this implies that the obligations and rights that belong to primary and secondary natural law apply irrespective of religious differences. In other words: under natural law, the believers can have rights and obligations even towards those with ‘false’ religious beliefs, such as non-Christians and heretics.

While in the first premise, Grotius emphasizes natural law’s independence of religion (so that natural rights and obligations apply irrespective of religious ‘error’), his second premise seems to point into the opposite direction: the believers must ‘carefully guard against all things that appear to go against divine glory and the true religion’.135 It is unclear whether Grotius’s second premise was also inspired by Aquinas, who had emphasized the duty of the believers to avoid any relations with non-Christians that could provoke a scandal and endanger the faith. Aquinas had specifically warned against the risk of apostasy, i.e., the risk of Christians ‘falling away’ from the true religion – a risk that existed especially in unequal relations, if Christians became the servants or subjects of non-Christian masters or rulers.136 In his second premise, Grotius does not mention Aquinas, but instead refers to the Gospel itself: ‘first of all, seek the kingdom of heaven’.137 Although the believers can have natural rights and obligations towards non-believers, they have an overriding duty to protect the Christian faith.138 The same verse from Matthew is later quoted and explained in De iure belli ac pacis: ‘No right whatsoever is sufficient to warrant committing what will probably be harmful to religion, indirectly, if not directly. For as a matter of first importance the kingdom of heaven is to be sought, that is, the spread of the Gospel’.139 Hence, no man-made or natural law may be invoked against the true religion, and the believers, instead, have a duty to contribute to the propagation of the Gospel. According to Grotius, alliances with non-Christians should thus be avoided if ‘the power of the heathen’ is thereby ‘greatly increased’.140 The reason is that if non-Christian rulers become too powerful, it may hinder the spread of the Gospel.

The combination of Grotius’s first and second premises implies that public and private partnerships between Christians and non-Christians are in general permissible under natural and divine law, unless they entail the risk of undermining the authority of God and the Christian religion. For Grotius, the defense of the true religion and the spread of the Gospel prevail over profane interests. However, this does not mean that Grotius reduces ‘the possibility of making alliances with the infidels to a mere theoretical possibility’, as one legal historian recently argued.141 Instead, in Grotius’s view, whether or not alliances with non-Christians are permissible depends on the nature of these alliances: if they greatly increase the power of non-Christian nations, then they may hinder the spread of the Gospel and must be avoided. By contrast, if alliances with non-believers increase the power of Christian nations, then they can effectively support the spread of the Gospel and contribute to the conversion of the ‘infidels’ to the Christian faith. More particularly, while alliances with non-Christians can deepen the internal divisions of Christianity in the European context,142 Grotius believes they can strengthen the position of Christian nations in the non-European context. As he concludes in De iure praedae, by entering into alliances with East Indian rulers and by protecting the ‘infidels’ from harm, the Dutch had effectively contributed to the spread of the Gospel: ‘there is nothing that serves the cause of the true religion better than such acts of kindness … Let them [the Indians, MdW] marvel at the faith which forbids that even unbelievers should be neglected. In achieving these ends, we shall be preparing men for God’.143

According to Grotius, it is thus generally permitted for Christians to enter into alliances with non-Christians, provided that these alliances do not undermine the Christian faith or hinder the spread of the Gospel. However, as Grotius emphasizes in the third premise of De societate, even if something is generally permitted, it is still necessary to distinguish what is decent from what is offending: in other words, even if a particular course of action is legally permissible, it is not always morally justified.144 Whether or not a particular course of action is justified depends on the circumstances of the case. According to Grotius’s fourth premise, in cases of ‘extreme necessity’ (extrema necessitas) many things become lawful which are otherwise unlawful.145 For instance, although Christians are generally prohibited from submitting themselves to the authority of a non-Christian ruler (because they can then be forced or induced to apostasy), this may become permissible in cases of necessity, if it is the only way to preserve one’s life.146 Moreover, according to Grotius’s fifth premise, what is normally just can cease to be just, and vice versa, due to a ‘special vocation’ (i.e., a divine calling).147 Grotius refers to the biblical example of Esther who – in violation of the general prohibition on mixed marriages between the faithful and non-believers – was ‘perhaps’ called to marry an infidel husband, because it allowed her to reveal the plot against her people.148 Finally, according to Grotius’s sixth premise, many actions that are just in themselves can become unjust if they are done with the wrong intent.149 In De societate, Grotius does not give any specific examples, but one may think of the case in which the believers enter into an alliance with non-Christians merely as a pretext to wage an unjustified war against another Christian nation.150

In his seventh premise, Grotius distinguishes between two categories of ‘non-believers:’ those who belong to the church and those who do not.151 Elsewhere in De societate, he explains this distinction: ‘It should be noted here that there are two kinds of non-believers or ἑτεροδόξοι; those who never belonged to the Church; and those who departed from it, or are expelled by an ecclesiastical judgement’.152 As we have seen, the first category includes Jews, Muslims and ‘pagans’. The second relates to heretics and apostates. To justify these distinctions Grotius refers to a verse from Paul’s first letter to the Corinthians: ‘For what have I to do to judge them also that are without? Do not ye judge them that are within’.153 This verse from Paul had played an important role in sixteenth-century debates about whether the pope could exercise jurisdiction over non-Christian populations.154 For instance, in his lecture on the American ‘Indians’, the Spanish jurist-theologian Francisco de Vitoria had referred to 1 Cor. 5.12 to argue that the pope had no spiritual power over the ‘infidel’ nations of the Americas and that, consequently, he did not have any temporal power over them either.155 It was thus unjustified to wage war against the American ‘Indians’ merely because they refused to accept papal authority or the Christian faith.156 Only if the Indians had converted to Christianity and become members of the ecclesiastical community did they fall under the pope’s jurisdiction.157 In De iure praedae, Grotius applied Vitoria’s arguments to the East Indian context, arguing that the princes and nations of the East Indies could not be deprived of their lands on the mere ground that the pope as ‘lord of the East Indies’ had donated their lands to the Spaniards and Portuguese. As Grotius concluded, it was clear that ‘even the Saracens were never despoiled on such grounds’.158

In his eighth premise, Grotius distinguishes between the different types of ‘societies’ that can exist between the believers and non-believers: they can either be public or private, equal or unequal, superior or inferior.159 ‘Public societies’ are entered into by, or on behalf of, states or public authorities (e.g., treaties or alliances between states). By contrast, ‘private societies’ refer to contracts or agreements between private parties (e.g., commercial contracts or business associations). As we have seen, in practice, the distinction between public and private societies was not always clear: for instance, in its founding charter, the voc had been authorized to enter into alliances with foreign rulers on behalf of the Dutch Estates General – these alliances were considered public alliances, even though they had been initiated by a private trading company.160 Moreover, Grotius explains that alliances between the believers and non-believers can either be equal or unequal, in the sense that they confer equal or unequal rights on the parties involved. In his Theses xi, Grotius had given the example of an ‘unequal alliance’ that granted the superior party the right to impose taxes upon its subject-ally, while allowing its ally self-government in other respects.161 Grotius would further develop his theory about ‘unequal alliances’ in De iure belli ac pacis.162 Here he explained that unequal alliances imposed ‘temporary or permanent burdens’ on the weaker party in exchange for protection by the superior party.163 As Grotius emphasized, the weaker party did not thereby necessarily lose its sovereignty. However, if unequal alliances became perpetual and if they granted the superior party the right to place garrisons on the lands of the inferior party, they could eventually lead to a transfer of sovereignty.164 This happened in the East Indies, where the voc’s alliances with East Indian rulers often forced the latter to vow ‘perpetual’ allegiance to the Dutch, while allowing them to build fortresses on native soil.165

According to Grotius’s ninth premise, an ‘alliance for purposes of war’ (societas bellica) can be justified as well.166 Both in the main text and in the reading notes of De societate, Grotius refers to the distinction made by Thucydides between two kinds of military alliances: συμμαχία and ἐπιμαχία.167 While the first relates to alliances established with a view to any cause of war whatsoever, the second pertains only to defensive alliances. Grotius had made the same distinction in De iure praedae, where he had connected the right to enter into defensive alliances (ἐπιμαχία) to the first law of nature: the right to defend one’s life and to shun what threatened to prove injurious.168 Grotius would further elaborate on Thucydides’s distinction in De iure belli ac pacis, where he explained that the term συμμαχία referred to general alliances by which parties agreed to have the ‘same enemies and friends’, while the term ἐπιμαχία stood for alliances aimed at protecting the parties’ boundaries only.169 In both the reading notes of De societate and De iure belli ac pacis, Grotius refers to alliances (foedera) between the Romans and their socii mentioned by Livy as examples of συμμαχία.170 However, as Grotius warns in his tenth premise, not every alliance between the believers and the non-believers can be just: what is permissible in general is not always just. As Grotius formulates it, ‘universal [alliance] should not be just without exception’.171 Whether or not an alliance with non-Christians is just depends on the circumstances. For instance, military alliances with non-Christians can only be just if either the believers or the non-believers have a just cause for war (e.g., if they have been unjustly attacked by others). Most importantly, as we have seen, alliances with non-Christians cannot be just if they risk undermining the authority of God or the Christian faith. Instead, for Grotius, the legitimacy of alliances with non-believers ultimately depends on whether they contribute to, or hinder, the spread of the Gospel.

7.2 Propositions and Conclusions

7.2.1 General Principles: Preventing Harm and Cultivating Friendship

After presenting his ten premises, Grotius continues by formulating a set of general propositions relating to the various kinds of partnerships between Christians and non-Christians (e.g., private and public, equal and unequal, etc.). His first proposition is that ‘[t]o refrain from harming non-believers and heretics in general is not only permissible for Christians, but also necessary’.172 As Grotius indicates, this proposition follows from the first premise, according to which an ‘error of faith’ does not diminish the obligations that originate from the law of nature. The law to which Grotius refers in his first proposition is the natural law of non-offensiveness, which prescribes that one should refrain from harming others without cause. In De iure praedae, Grotius had identified several sources of this law, including Justinian’s Institutes and Cicero’s De officiis, which described the obligation to refrain from harming others, unless provoked by wrong, as a fundamental duty of justice.173 In both De iure praedae and De societate, Grotius suggests that the duty to refrain from harming others without cause is a fundamental duty under natural law, which applies independently of religion: hence, in general, Christians should refrain from harming others, including non-believers and heretics. As Grotius explains in De societate, the natural law of non-offensiveness does not conflict with Christian law, but is instead confirmed by it: ‘the law of nature prescribes that evil should be inflicted on no one, and Christ emphasizes this a thousand times’.174 In Grotius’s opinion, Christians therefore have a duty under natural and Christian law to refrain from harming others, including non-Christians and heretics.

From this first proposition, Grotius derives his first conclusion: ‘It is permissible for both private and public persons to enter into a pact with non-believers or heretics not to harm one another’.175 To justify his conclusion, Grotius refers to the examples of the alliances of Abraham and Isaac with the ‘heathen King’ Abimelech, the alliance of Jacob with his father-in-law Laban, and of David and Solomon with Hiram, the king of Tyre.176 These same examples are also mentioned in the reading notes, where they are briefly explained.177 For instance, the alliance between the ‘pious man’ Abraham and the ‘heathen king’ Abimelech is characterized by Grotius as an alliance ‘of non-offensiveness and of cultivating friendship’.178 However, alliances to prevent harm are not always permissible. Grotius makes an exception for those cases in which the believers have been expressly forbidden by God to enter into pacts or alliances with particular infidel peoples. He gives the examples of the Amalekites and the ‘six cursed peoples’, who were condemned by a divine sentence.179 The believers were thus required by a divine decree to punish these ‘infidel’ peoples and strictly prohibited from entering into an alliance with them.180 Even so, Grotius warns his readers not to confuse the exception with the rule: the believers are not allowed to enter into alliances with the Amalekites and the ‘six cursed peoples’ due to a ‘special reason’, but in general, it is permissible for the believers to enter into alliances with non-believers to protect each other from harm. In De iure belli ac pacis, Grotius refers to the same biblical examples to conclude that, generally speaking, alliances ‘with those who are strangers to the true religion [cum his qui a vera religione alieni sunt]’ are permissible under Hebraic law.181

While Grotius’s first proposition relates to alliances to prevent harm, his second pertains to treaties of friendship and commercial partnerships: ‘Good deeds, duties, trades, for the sake of charity, civility, and utility, can be rightly cultivated reciprocally between the faithful and the non-believers or heretics’.182 The right to cultivate friendship with non-believers follows from Grotius’s first premise, according to which ‘errors of faith’ do not change the law of nature. Once again, natural law is confirmed by divine law: the reading notes refer to several examples of kings of Israel who had concluded treaties of friendship or trade with non-believers. For instance, the alliance between Abraham and Abimelech is characterized by Grotius as an alliance for ‘cultivating friendship [societas de colenda amicitia]’ and the alliance between Solomon and Hiram as a ‘partnership for trade [societas mercatoria]’.183 Grotius’s proposition is, moreover, followed by an important amplification: ‘it is not only allowed to do good to non-believers or heretics, but according to the circumstances … even necessary, when we can help them without great disadvantage to ourselves, especially when they ask our help themselves’.184 In other words, the faithful not only have a right, but, depending on the circumstances, also a duty to do good to non-believers. Grotius gives the example of showing a stranger the way to a well, which should be regarded as a ‘duty of civility’ (officium civilitatis), but which may turn into a legal obligation in case of ‘extreme necessity’ (e.g., if the stranger would otherwise die from thirst).185

To prove his second proposition that the believers should do good to non-believers and heretics, Grotius refers to classical and biblical sources. He mentions Cicero’s discussion of Ennius, who had given the example of showing a stranger the way and allowing him to lit his lamp with one’s own.186 Cicero had related the duty ‘to bestow even upon a stranger what it costs us nothing to give’ to natural law, arguing that ‘the common right to all things nature has produced for the common use of man is to be maintained’.187 In De iure praedae, Grotius had referred to the same passage in Cicero, explaining that ‘everything capable of serving the convenience of a given person without detriment of the interests of any other person’ had remained the ‘common possession of all’.188 Grotius had given the examples of the sea and running water: even when used by a specific individual or nation, they nevertheless sufficed for general use by others. Hence, under the law of nature, a right of use existed to whatever was suitable to being used by all, and, since it originated from nature itself, it applied independently of religion. In De societate, Grotius refers not only to Cicero, but also to Seneca’s opinion that good should be done even to the wicked and the ungrateful.189 In De beneficiis (4.28), Seneca had observed that God ‘has given certain gifts to the whole human race, and from these no man is shut out’.190 He had mentioned the sea as an example: it was ‘to the common good that traffic on the sea should be open to all’.191 As Grotius suggests in De societate, the principles formulated by Cicero and Seneca apply to all ‘benefits:’ hence, under natural law, ‘gifts, services, favours’ should be bestowed on the believers as well as on non-believers and heretics.192

According to Grotius, the duty to do good to non-believers and heretics does not only follow from natural law, but also from Christian law. He evokes the parable of the Samaritan, explaining that Christ thereby instructed the Jews to treat others as their neighbors.193 He also quotes a verse from Juvenal’s Satires to criticize the ‘errors of the Jews’, which allegedly consisted of their refusal to provide assistance to non-believers.194 The same combination of sources reappears in the introduction of Grotius’s Remonstrantie, where he explains that ‘the Jews have held the malicious view that they do not owe people of other religions even the smallest acts of kindness, to which our Lord bears witness in the parable of the Samaritan, which taught, contrary to Jewish opinion, that the expression “our neighbours” must not be restricted to members of the same religion. A Roman poet who described the Jewish customs said they would not want to show the way nor a well to an uncircumcised man’.195 Refuting this ‘malicious view’ of the Jews, Grotius explains that the parable of the Samaritan teaches the believers to treat all people as their neighbors, including those of other creeds.196 The implication is that ‘non-believers’ (including the Jews themselves) should be treated well, despite their ‘errors’. To support his conclusion, Grotius quotes the Sermon on the Mount: ‘Do like your Father, who causes his sun to rise and sends his rain on the good and the evil’.197 The same quotation can be found in De societate, where Grotius explains that the sun and the rain stand for ‘all the good things of Nature’.198 In De societate and the Remonstrantie, the same sources (e.g., the verses from Juvenal’s Satires, the parable of the Samaritan, and the Sermon on the Mount) are invoked to demonstrate that the believers should treat non-Christians (e.g., Jews) well.199 As Grotius suggests, this is not merely a right, but a legal and religious obligation.200

However, according to Grotius, the duty to do good to non-believers is subject to three conditions (or ‘limitations’), which follow from his second premise. The first is that ‘[g]reater charity must be shown towards the faithful than towards the unfaithful’.201 As evidence for his claim Grotius refers to Paul’s Letter to the Galatians: ‘Let us do good unto all men, especially unto them who are of the [same] household of faith’.202 The question whether in doing good to others the believers should be preferred over non-believers had been the topic of an age-old theological debate, which had focused on the issue of alms-giving. In his reading notes, Grotius refers to Aquinas’s discussion of whether the believers should give preference to their fellow-believers in alms-giving.203 Aquinas had concluded that, as a general rule, Christians should in preference help their fellow-believers. However, they had discretion in determining whom to give alms to, according to the various degrees of connection, holiness and utility.204 This implied that they could decide to prioritize, for instance, those in greater want over those more closely connected to them. Moreover, later scholastics argued that in cases of necessity, when receiving alms was necessary to preserve one’s life, no distinction could be made between the believers and non-believers.205 For instance, in his Deliberatio in causa pauperum (1545), the Dominican theologian Domingo de Soto concluded that ‘if the matter is referred higher, to natural law, the human race is united by the closest bond in its very nature, so that, unless they were our enemies, or we feared some detriment to the faith from them, it would not be rightful to reject even infidel beggars from our commonwealth’.206

One of the conditions for alms-giving to ‘infidel beggars’ mentioned by Soto – that no alms may be given to ‘infidel beggars’ if it causes some detriment to the faith – reappears in Grotius’s second limitation: it is not allowed to bestow charity on non-believers if it entails the risk of causing a loss of faith.207 As Grotius indicates, this limitation follows from the second premise that the believers should avoid anything that may diminish the glory of God and the true religion.208 Grotius illustrates the limitation with the example of usury. Under the laws of the church, the believers were strictly forbidden from practicing usury, that is, from lending money on interest.209 However, the prohibition did not apply to strangers: it was thus permissible to take usury from strangers.210 As Aquinas explained, taking usury from strangers was not in general lawful, but it was permissible to avoid a greater evil, namely that avarice might lead the believers to take usury from their fellow-believers.211 From a Christian perspective, usury and infidelity were closely related: usury was regarded as the economic manifestation of various forms of infidelity, and as the consequence of the incapacity of non-believers (e.g., Jews) to recognize the spiritual value of Scripture.212 Grotius does not mention Aquinas in this context, but he quotes directly from the Bible: ‘You shall lend to a stranger at usury; but not to your brother. You shall demand [usury] from a foreigner’.213 Explaining these verses, Grotius notes that the community that exists between men by nature (societas naturae) is limited by the community between the faithful that exists by divine grace (societas gratiae).214 Therefore, Grotius believes it is reasonable to give preference to the faithful over non-believers, and to accept usury from strangers, but not from brothers.

Having discussed the duty to do good (e.g., to give alms) to non-believers, Grotius examines the various types of private and public ‘societies’ that may exist between the believers and non-believers. He begins by presenting his views on ‘equal societies’, which may testify to ‘different degrees’ of friendship and familiarity.215 Changing the order of presentation, he starts by outlining the limitations to his third proposition before formulating the proposition itself. The first limitation is that stronger bonds of friendship and familiarity should be cultivated with the faithful than with non-believers. Grotius explains that the ‘greatest bond of friendship [maximum amicitiae vinculum]’ is the ‘harmony of strivings [studiorum consensio], especially concerning the greatest matters [res maximas]’.216 Grotius seems to refer to Cicero’s speech on behalf of Gnaeus Plancius, where the Roman philosopher identifies the ‘complete unity of aim’ as the ‘traditional condition of genuine and sincere friendship’. As Cicero specifies, ‘there is no surer bond of friendship [amicitiae vinculum] than the sympathetic union of thought and inclination [consensus et societas consiliorum et voluntatum]’.217 By relating Cicero’s concept of friendship to the ‘greatest matters’, Grotius reinterprets it in religious terms, as the bond that exists between the believers. With a reference to Aristotle and the Gospel, he suggests that the ‘harmony of strivings’ is based on brotherly love (φιλαδελφία) and aimed towards divine truth.218 The implication is that stronger bonds of friendship and familiarity should exist between the believers than between the believers and non-believers.219

Recalling the distinction from his seventh premise, Grotius points out that there are two kinds of non-believers: those who never belonged to the Church (i.e., non-Christians), and those who departed from it or were expelled from it by an ecclesiastical judgement (i.e., apostates and heretics).220 From this premise follows a second limitation: the believers should in general abstain from intimate relations and social intercourse with those who have left the church or who have been condemned by its judgement.221 According to Grotius, there is a ‘special reason’ for not associating with heretics and apostates: they should ‘return to shame and repentance’.222 However, the duty to abstain from associating with apostates and heretics does not apply without exceptions: in cases of necessity, it is allowed to associate with them.223 According to Grotius, this is also permissible in cases of utility if the believers associate with the non-believers in the hope of converting them to the true faith. However, in a deleted sentence, Grotius suggests that the exception does not apply to those believers who are of weak conviction: they should abstain from intimate relations with ‘other non-believers’, because they thereby risk falling away from the faith themselves.224 In De iure belli ac pacis, Grotius makes a similar observation with regard to ‘strangers to the true religion:’ he argues that ‘too great intimacy’ with the latter should be avoided, because it may contribute to a ‘contamination of the weak’.225 For this reason, the believers should live apart from non-believers, just as the Israelites lived apart from the Egyptians during their exile.226 Likewise, in his Remonstrantie, Grotius observes that the mere sight of the Jews may ‘instill doubts in the weak-minded regarding the principal points of salvation’.227 However, he also suggests that this can be prevented by good legislation and the efforts of the clergy.228

The source of Grotius’s second limitation appears to be Aquinas’s discussion of whether the believers are allowed to ‘communicate’ with non-believers.229 As Aquinas explains, there are two reasons why it may be forbidden for the believers to communicate with non-believers. The first is to punish non-believers for their unbelief. The second is to protect the believers from the risk that they may be led away from the faith. Crucially, the first reason (punishment) applies only to non-believers who have forsaken the faith they once received, either by corrupting it, as heretics, or by renouncing it, as apostates: the believers are thus forbidden from communicating with heretics and apostates so that they are punished for corrupting or renouncing the Christian faith.230 By contrast, it is not forbidden for the believers to communicate with non-believers who have never received or accepted the Christian faith, such as Jews and pagans. The latter may not be punished for their lack of faith, because the church does not exercise any spiritual judgement over them (as they do not belong to the Christian community). However, as Aquinas explains, the believers may not communicate with Jews or pagans if they thereby risk falling away from the faith themselves. Hence, those believers who are ‘firm in their faith’ may communicate with Jews and pagans in the hope of converting them to Christianity. However, ‘simple people, who are weak in their faith, and whose perversion is to be feared as a probable result, should be forbidden from communicating with non-believers, and especially from being on very familiar terms with them, or from communicating with them without necessity’.231

Grotius’s second limitation builds on these distinctions: it applies specifically to heretics and apostates, but not to Jews and pagans. The believers should thus refrain from living together or associating with apostates and heretics for a ‘special reason’, namely ‘that they should return to shame and repentance’.232 By contrast, Grotius’s third limitation applies to both heretics and apostates, and non-Christians, such as pagans and Jews. The believers are thus warned ‘not to enter into a very close familiarity with non-believers and heretics without reason, but those who converse with non-believers of another kind should take care on all occasions, so that they try to bring them to good sense both by doctrine and example’.233 The final part of the sentence is essential: it implies that no force may be used to convert non-believers to Christianity. Instead, the ‘infidels’ should be brought to the true faith ‘by doctrine and example’.234 In Grotius’s view, the believers have a duty to contribute to the voluntary conversion of Jews, pagans and heretics to Christianity. Hence, those who are ‘firm in their faith’ are allowed to communicate with the non-believers, so that they may ‘bring them to good sense’.235 These considerations lead Grotius to formulate his third proposition: ‘It is permissible to have some friendship and familiarity with non-believers and with heretics’.236 According to Grotius, this is permissible, because it may contribute to their (voluntary) conversion to Christianity (or acceptance of the true Christian doctrine). However, it is permissible under the strict condition that contacts with non-believers and heretics do not cause the believers (e.g., those weak of faith) to fall away from the faith.

7.2.2 Private Alliances: Marriages Between Believers and Non-Believers

After discussing the general conditions under which relations of friendship and familiarity with non-believers are permissible, Grotius turns to the more specific issue of marriage. In his fourth proposition, he addresses the question whether marriages between Christians and non-Christians can be lawful.237 He begins by explaining that marriage is the ‘highest union’ (summa coniunctio); from a Christian perspective, it is considered a sacred bond, so that divorce is generally not allowed under the laws of the church.238 However, mixed marriages between the believers and non-believers may also lead to apostasy if, for instance, a Christian wife is forced or induced to adopt the faith of her non-Christian husband. Grotius therefore distinguishes between marriages that have already been concluded and those that are still to be concluded.239 He argues that marriages that have already been concluded (e.g., existing marriages) are legally binding: thus, a Christian wife is not allowed to separate from her non-Christian husband, nor a Christian husband from his non-Christian wife.240 This follows from 1 Cor. 7.12: ‘If any brother hath a wife that believeth not, and she be pleased to dwell with him, let him not put her away’. However, it is permissible for a Christian magistrate to make a law declaring such existing marriages between believers and non-believers null and void. As Grotius explains, the magistrate may issue a law invalidating existing marriages if he has a ‘just reason’ for doing so. This follows from Ezra 10.3, which narrates how Ezra and the high priests of Israel swore an oath to send away the ‘strange wives of the people of the land’ to restore the covenant with God. Hence, according to Grotius, existing marriages between the believers and non-believers should in general be respected, and the believers are not allowed to separate from their infidel spouses, unless the magistrate has issued a law invalidating such marriages for a ‘just reason’.

While existing marriages between the faithful and non-believers are generally binding, marriages that are still to be concluded (i.e., future marriages) should in general be prohibited. The reason is that, in Grotius’s view, the main purpose of marriage is the upbringing of children to the glory of God, which is ‘not a little hindered’ if one of the parents is a non-believer.241 To justify the general prohibition on future marriages between Christians and non-Christians, Grotius quotes 2 Cor. 6.14: ‘Be you not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? And what communion hath light with darkness?’ He adds a reference to Scaliger’s Animadversiones in Eusebium, where it is suggested that Herodes was born from a mixed marriage, and that his (non-Jewish) mother had only been allowed to marry his Jewish father by accepting the Jewish rites. As Scaliger explains, while Moses and Nehemiah had prohibited marriages with Moabite women, in the course of time, marriages between Jewish men and pagan wives had become tacitly permitted, until, at the time of the Hasmoneans, it became a strict law that no Jew lived together with a pagan wife, not even secretly.242 To justify the general prohibition on mixed marriages Grotius refers to the examples of Solomon, who had sinned by living together with pagan women, and Manasseh, brother of the high priest, who was said to have defiled the priesthood by such a marriage.243 However, in accordance with Grotius’s fifth premise, an exception should be made in cases of divine vocation. He refers to the example of Esther, who was ‘perhaps’ called to marry a non-believer, the Persian king Ahasuerus, so that she could reveal Haman’s plot against the Jewish people.244 In accordance with Grotius’s fourth premise, an exception should also be made in cases of necessity, when the believers cannot conclude marriages, except with pagan women. This is the case when they find themselves in foreign places, where there are not enough marriage partners of their own faith.245

Grotius’s discussion of marriages between the believers and non-believers in De societate seems to have informed his Remonstrantie or draft regulations for the Jews.246 Thus, Article 27 of his regulations contains a general prohibition on marriages between Christians and Jews: no Jewish man shall be allowed to marry a Christian woman, nor a Jewish woman a Christian man.247 To justify this prohibition Grotius cites the same biblical sources he had discussed in De societate.248 He also suggests that the general prohibition on mixed marriages does not apply to marriages that have already been concluded. Thus, according to Article 36, if the wife of a Jewish husband has converted to Christianity, she will only obtain permission to separate from her husband and to live on her own if she is abused because of her faith.249 In a note, Grotius explains that existing marriages between Jews and Christians should in general be respected: he refers to Paul’s advice to the believers not to separate from their infidel spouses if they want to continue their cohabitation.250 Invoking the example of Ezra, he argues that the magistrate may prohibit such marriages by public order for a special reason, for instance, if one of the spouses abuses the other in regard of religion.251 Hence, in his Remonstrantie, Grotius applies the same distinctions he had developed in De societate: marriages between Christians and Jews that are still to be concluded (i.e., future marriages) are generally forbidden. However, marriages that have already been concluded (i.e., existing marriages) should in general be respected, and the magistrate may only invalidate such marriages for a just reason. Moreover, he refers to the same biblical sources (e.g., 1 Cor. 7.12 and Ezra 10) to justify these distinctions.252

7.2.3 Public Alliances: Treaties of Friendship and Military Alliances

After discussing the issue of mixed marriages as an example of ‘private alliances’, Grotius turns to the question of ‘public alliances’. Building on his second proposition that the believers should do good to non-believers and heretics, he formulates his second conclusion: ‘[t]reaties with the non-believers are rightly entered into for the sake of friendship, commerce, travels, and other benefits which are mutually guaranteed’.253 Grotius mentions the example of Solomon’s treaty with Hiram, which entailed ‘peace and alliance’ (pax et foedus) and ‘trade’ (commercium).254 However, as Grotius realizes, the Bible also contains several passages that seem to condemn the believers for entering into treaties and alliances with non-believers. Grotius refers to 2 Chr. 20.37, where Josephat’s treaty with Ahazia is identified as the cause of divine wrath.255 Recalling his sixth premise, Grotius explains that this treaty was not unlawful in itself, but condemned because of Ahazia’s ‘wicked’ intentions.256 He suggests that there may ‘perhaps’ have been a special reason for condemning the treaty, as the king of Israel was an apostate.257 The implication is that, as a general rule, it is permissible for the faithful to enter into treaties of friendship or trade with non-believers, unless such treaties should be condemned for a ‘special reason’ or because of the ‘inner state of mind’ of the contracting parties. Moreover, the general rule that it is permissible for the believers to enter into treaties of trade or friendship with non-believers is subject to an important condition: the believers should receive greater, not lesser, benefits from those treaties than the non-believers.258

Apart from treaties of friendship and trade, the believers may also enter into military alliances with non-believers.259 Grotius recalls his eighth premise, in which he had made a distinction between defensive and offensive alliances (ἐπιμαχία and συμμαχία).260 In his reading notes, he presents a sub-distinction between the various types of defensive and offensive alliances which can be concluded between the believers and non-believers. In the case of defensive alliances, they can either be alliances for the defense of the believers, or for the defense of the non-believers. In case of offensive alliances, they can either be aimed against the believers, or against the non-believers.261 In accordance with his tenth premise, Grotius explains that a military alliance – whether defensive or offensive – may not be entered into for every future war without exception. Instead, for such an alliance to be justified, there should be a justa causa belli.262 In De societate, Grotius does not explain what causes of war are justified. However, in De iure praedae, he had specified that a just war could be waged on four grounds: self-defense, the defense of one’s property, the enforcement of rights arising out of debt, and punishment for wrongdoing.263 The fourth ground implied that a just war could be waged not only to protect one’s own rights, but also to protect the rights of others and, more particularly, ‘to defend the victims of unjust oppression’.264 As we will see below, in De societate Grotius mentions both self-defense and the defense of the victims of unjust oppression as possible justifications for military alliances with non-believers.

The question whether military alliances with non-believers could be lawful and legitimate had been the topic of a centuries-old debate among jurist and theologians.265 As Tuck explains, the main question was whether it was permissible for Christians to use the assistance of non-believers in a war against other Christians.266 Medieval canonists had concluded that military alliances with non-believers had to be condemned, especially if they were aimed against Christians. According to the ordinary gloss to the Decretals, ‘Christians who attack other Christians in alliance with Saracens, either by supplying help or by participating themselves, are worse than Saracens. By canon law they are condemned to slavery and can be repeatedly excommunicated’.267 More positive attitudes towards military alliances with non-Christians had started to emerge in the fourteenth century, as the papacy decided to support Charles of Anjou, who used the assistance of Moslems in his attempts to conquer Southern Italy.268 For instance, in his Consilia, Oldradus de Ponte, a jurist at the papal court at Avignon, argued that it was sometimes permissible for Christians to enter into alliances with non-Christians to defend their own lives and possessions. However, Oldradus did not discuss alliances that were aimed against Christians.269 By contrast, John of Naples, a Dominican theologian, claimed that, in cases of ‘urgent necessity’, a Christian ruler could use the aid of non-believers, even against other Christians.270 In his reading notes, Grotius briefly refers to Oldradus’s views on military alliances with non-believers, but he does not mention John of Naples.271

By the beginning of the sixteenth century, the predominant view had become that military alliances with non-believers could be legitimate, but only if they were defensive alliances.272 This view was expressed in the Summae Sylvestrinae of the Dominican theologian Silvester Mazzolini da Pierio, and quoted by Grotius in his reading notes: ‘Christians having a just war for their own defense can use peaceful infidels who have no active or passive war with us; when necessity is pressing, not otherwise’.273 As Sylvester explained, using the aid of non-Christians was allowed for purposes of self-defense, provided that the ‘infidels’ were not themselves at war with Christians, and only in cases of ‘imminent necessity’. Sylvester had referred to the opinion of Nicholas of Lyra, a fourteenth-century Franciscan theologian – a reference which Grotius also included in his reading notes.274 Nicholas had given the example of David, who had justly used the military aid of the Philistines against his own people, because he had a right to the kingship of Israel.275 In his reading notes (just below the references to Nicholas and Sylvester), Grotius also mentions two contemporary examples, of kings ‘Francis’ and ‘Antoine’.276 Unfortunately, he does not elaborate on these examples, and it remains uncertain which kings or alliances he has in mind. Grotius may have thought of the military alliance between Francis i of France and Suleiman the Magnificent of the Ottoman Empire (1536), which was aimed against the Habsburg emperor.277 By referring to the opinions of Nicholas and Sylvester, the example of David’s alliance with the Philistines, and (perhaps) France’s alliance with the Ottomans, Grotius suggests that alliances with non-believers are permissible in cases of self-defense, even if they are aimed against other Christians.

While medieval jurists and theologians had accepted alliances with non-believers only in cases of ‘urgent necessity’ and ‘self-defense’, the sixteenth-century Iberian jurists were less reluctant to accept such alliances, because they recognized their importance for empire-building in Asia and the Americas.278 For instance, in his lecture on the American ‘Indians’, Vitoria had argued that the Spaniards could wage a just war on behalf of non-Christian allies, even if they were not themselves attacked. As Vitoria explained, the Spaniards had a justa causa belli if their (non-Christian) allies were engaged in a just war among themselves and had requested their assistance.279 However, Vitoria referred to Spain’s alliance with the Tlaxcaltecs against the Aztecs, and he did not discuss alliances that were aimed against Christians.280 Other Spanish jurists, such as Luis de Molina and Francisco de Suarez, accepted the legitimacy of alliances with non-believers, but they also warned that such alliances could lead to a scandal for Christianity if they were aimed against Christians.281 By contrast, Protestant jurists generally rejected alliances with ‘infidels’, irrespective of whether they were aimed against Christians or non-Christians. By the end of the sixteenth-century, the standard Protestant view had become that no military alliances with non-Christians were permitted at all.282 This view was expressed by Alberico Gentili, who concluded that ‘it is lawful neither to lend aid to unbelievers nor to accept aid from them against other unbelievers. And if it is not lawful to do this against unbelievers, how much less will it be allowed to do it against the faithful?’283

The reading notes of De societate contain several references to Vitoria and Gentili.284 Strikingly, Grotius does not refer to Gentili’s chapter on alliances with non-believers (in which military alliances with non-believers are expressly rejected), but to another chapter, entitled ‘On Defending the Subjects of Another Against their Sovereign [De subditis alienis contra Dominum defendis]’.285 In this chapter, Gentili explains that it is sometimes just to defend the subjects of another sovereign if a ‘dispute [arises] regarding the state [controversia de re publica]’ and if they are treated ‘cruelly and unjustly [inclementer et injuste]’.286 Aiding the subjects of another sovereign is permissible even if one’s own cause is unjust, but only with the purpose of saving them from ‘immoderate cruelty and unmerciful punishment [saevitiae immoderatioris, & poenae inclementioris]’.287 By referring to these passages in the context of a discussion of military alliances with non-believers, Grotius implies that such alliances may be legitimate if they serve to protect the non-believers from inhumane treatment. Crucially, for Grotius, military alliances with non-Christians are justified not only in cases of self-defense, but also for defending the non-believers from unjust oppression. Ignoring Gentili’s objections against military alliances with non-Christians, Grotius suggests that Gentili’s arguments regarding the legitimate defense of the subjects of another sovereign may also apply to non-Christians: hence, military alliances with non-Christians can be just if they serve to protect the ‘infidels’ from oppression.288

Even more revealing are Grotius’s references to Vitoria. In his reading notes, Grotius refers twice to passages in De Indis, in which Vitoria discussed the various just titles by which the American ‘Indians’ had passed under the rule of the Spaniards. Grotius refers to the fifth just title: the defense of the innocent against tyranny.289 As Vitoria argued, the Spaniards could wage a just war to protect the subjects of Indian rulers against tyranny and inhumane practices such as human sacrifice and cannibalism.290 Referring to these passages, Grotius explains that Christians may enter into an ‘alliance for the defense of some of the non-believers against the non-believers’ (societas pro defensione singulorum infid[elium] contra infid[eles]).291 In the reading notes, he also mentions Vitoria’s seventh just title: the assistance of (non-Christian) allies.292 Vitoria had argued that the Spaniards could wage a just war against the Indians ‘whenever the barbarians are engaged in a legitimate war with one another, in which case the injured party has the right to wage war, and may call upon the Spaniards to help them, and then share the prizes of victory with them’.293 As we have seen, Vitoria had given the example of the Spanish alliance with the Tlaxcaltecs, who were fighting a war against the Aztecs. As Vitoria explained, the Spaniards had made a treaty with the Tlaxcaltecs that they would help them to defeat the Aztecs and receive in return whatever booty they might seize.294 In his reading notes, Grotius refers to this passage, explaining that it relates to an ‘alliance with a non-believer who is waging a just war against a non-believer who is waging an unjust war’ (societas cum infideli iuste bellante contra inf[idelem] iniuste bellantem).295 On Grotius’s reading of Vitoria, the believers may thus enter into military alliances with non-believers, provided that their allies are waging a just war against other non-believers.

The references to Vitoria appear to be the main source for Grotius’s third conclusion: ‘[I]n a just war the non-believers will be rightly defended by the faithful, even if those who oppress the non-believers wish to be considered as faithful [etiamsi ii qui Infideles opprimunt Fideles haberi velint]. Nay, this work is not only permitted, but also highly praiseworthy, and because of the circumstances often necessary’.296 Like Vitoria, Grotius maintains that a war may be waged to defend the non-believers from inhumane cruelty and oppression. However, in sharp contrast to Vitoria, he argues that the non-believers may rightly be defended even if those who oppress them ‘wish to be considered as faithful’. While Vitoria referred to military alliances between Christians (e.g., the Spaniards) and non-Christians (e.g., the Tlaxaltecs) that were aimed against non-Christians (e.g., the Aztecs), Grotius concludes that alliances for defending non-Christians from oppression may even be directed against Christians. As we have seen, Grotius’s conclusion was probably meant to justify the Dutch alliances with non-Christian rulers in the East Indies, which were aimed against the Spaniards and Portuguese.297 Thus, in De iure praedae, Grotius had used similar arguments to justify the Dutch alliance with the Sultan of Johor, which, in his view, served to defend the Sultan and his people from Iberian ‘oppression’. As Grotius explained, ‘not only is it universally admitted that the protection of infidels from injury (even from injury by Christians) is never unjust, but it is furthermore maintained, by authorities who have examined this particular point, that alliances and treaties with infidels may in many cases be justly contracted for the purpose of defending one’s own rights, too’.298 As Grotius concluded, it was permissible for Christians to enter into military alliances with non-Christians, even if they were aimed against other Christians. Such alliances were justified not only to protect the rights of the believers themselves (e.g., to free navigation and trade), but also the rights of their ‘infidel’ allies (e.g., not to be oppressed).

As Grotius explains in his third conclusion, protecting the non-believers from oppression is not only praiseworthy, but it may even be necessary.299 As Grotius indicates, this follows from the amplification of his second proposition: the believers have a duty to lend assistance to non-believers if they can do so without great disadvantage for themselves, and especially if the non-believers have requested their assistance. To prove the conclusion that in these circumstances, Christians have a duty to protect non-Christians from oppression, Grotius refers to Psalm 82.4: ‘Deliver the poor and needy: rid them out of the hand of the wicked’, and Prov. 24.11: ‘Deliver them that are drawn unto death, and forebear not to deliver those that are ready to be slain’. By citing these biblical verses Grotius implies that the duty to protect the innocent from unjust oppression originates from divine law itself. In De Indis, Vitoria had also referred to Prov. 24.11 to demonstrate that the Spaniards could wage a just war to prevent ‘Indian’ rulers from subjecting their own people to inhumane customs and rites.300 By contrast, Grotius cites Prov. 24.11 and Psalm 82.4 to conclude that, depending on the circumstances, Christians have a duty to protect the non-believers from unjust oppression, even if those who oppress them are Christians. However, an exception should be made if it has been revealed that God wants to punish particular nations for their unbelief. The believers are thus prohibited from entering into military alliances with nations that have been condemned by God (irrespective of whether or not they are unjustly oppressed).301

According to Grotius’s fourth conclusion, the believers may also themselves request the military assistance of non-believers, provided that they have a just cause for war.302 In his reading notes, Grotius mentions several sources to justify this conclusion, including Panormitanus’s gloss on the Decretals, which expressly states that ‘it is lawful for Christians to use the assistance of infidels’,303 and the advice of Oldradus that ‘if a war is just, a Christian may without sin use, for his own defense, the aid of infidels on his part’.304 The reading notes also mention several biblical examples of wars waged by the believers with the military assistance of non-believers, for instance, the war of the Israelites against Nebuchadnezzar, for which they had requested the assistance of the king of Egypt.305 However, unlike Panormitanus and Oldradus, Grotius suggests that the believers may use the military assistance of non-believers for any just cause whatsoever, not only for self-defense, but also for protecting others from oppression. Moreover, he explains that the military assistance of non-believers should be regarded as a ‘benefit’ (beneficium). He refers to a passage from Seneca’s De beneficiis, where it is argued that one should accept benefits only from those to whom one could have given such benefits, that is, from honorable men.306 As Seneca explains, this does not exclude the possibility that in cases of necessity, a benefit may also be received from dishonorable men, such as tyrants, pirates or brigands, ‘for necessity removes any possibility of choice’.307 In other words: in a just war, the believers may accept the assistance of non-believers, just as benefits may be received from dishonorable men in cases of necessity.

However, Grotius’s conclusion that the believers may wage a just war with the assistance of non-believers is made subject to two conditions. The first is that using the assistance of non-believers is not permitted if it gives them an ‘occasion for harming the truth’ (occasio nocendi veritati).308 This condition follows from the second premise that the believers should carefully guard against anything that may harm the true religion: hence, using the military assistance of non-believers is not allowed if it undermines the authority of God or hinders the spread of the Gospel. The second condition is that, even in a just war, the assistance of non-believers may not be used if it is done out of ‘distrust’ (diffidentia).309 There are different ways to interpret this condition. The first is that the believers, in accepting the assistance of non-believers, may not themselves be driven by a lack of faith. In his reading notes, Grotius gives the example of Asa, King of Judah, who had entered into an alliance with Syria, because he had lost faith in God.310 The second interpretation is that, in any war, both the believers and the non-believers remain bound by the requirements of good faith or ‘public trust’ (fides publica). This requires them, among other things, to show moderation in exercising power or coercion, even if doing so is permitted by the laws of war. In an early treatise, entitled De fide et perfidia (Of Good and Bad Faith, ca. 1601–1602), Grotius had argued that the requirements of public trust originated from natural law, i.e., from the natural fellowship between men.311 Therefore, they applied irrespective of religious differences.312 As Grotius would later put it in De iure belli ac pacis, ‘no war ought to be so much undertaken but for the obtaining of a right, nor when undertaken, ought to be carried beyond the bounds of Justice and Fidelity’.313 In Grotius’s view, it was thus permissible for Christians to use the assistance of non-believers in war, provided that the believers did not violate the obligations of ‘public trust’.

7.2.4 Unequal Alliances: The State and Slavery

In the final part of De societate, Grotius addresses the question of intra-state relations between the believers and non-believers. According to his fifth conclusion, ‘the highest public partnership is the union of the state [unio reipublicae]. But there is no doubt that a faithful people can remain in one state with non-believers’.314 As we have seen, both Cicero and Aquinas had characterized the state (res publica) as a societas publica.315 They had defined the state as an assemblage of people who, in Cicero’s words, had ‘associated [sociatus] in an agreement with respect to justice and a partnership for the common good’.316 As Cicero explained in De re publica, this association originated not so much from the weakness of individuals, but from a ‘certain natural fellowship of men’.317 Building on Cicero’s understanding of the state as an ‘association’ originating from nature itself, Grotius concludes that it can encompass both the believers and non-believers. According to Grotius, the believers can therefore live together in one state with non-believers and even with heretics. To justify this conclusion Grotius refers to Scaliger, who, in his Animadversiones in Eusebium, had discussed the example of the Jews, who had lived together in one state with the Idumaeans (or Edomites).318 He also mentions the example of ‘Israel with Egypt’, perhaps a reference to the fact that the Israelites had settled in Egypt after one of them, Joseph, had become a high official at the court of Pharaoh.319 As Grotius suggests, the believers may live together in one state with non-believers, because as the ‘highest public partnership’, the state originates from the natural community of mankind, which includes both the faithful and non-believers.

However, according to Grotius’s sixth conclusion, it is doubtful whether the believers may voluntarily join a state with non-believers.320 Grotius draws a parallel with his discussion of marriage: just as the purpose of marriage is to educate children ‘to the glory of God’, the end of a ‘true state’ is to direct its citizens to divine glory, which may be hindered if the state is shared with non-believers. Living together in one state with non-believers may thus lead to apostasy if a Christian subject is forced or induced by a non-Christian government to give up his faith, just as a Christian wife may be induced or forced to adopt the religion of her non-Christian husband. To prevent these risks, Grotius indicates that the ‘same thing should be taught’ (idem docendum) in regard of the state as was taught in regard of marriage: if the believers are already living together in one state with non-believers, then they may continue to do so. However, the believers should not be allowed to start living together with non-believers, unless a necessity requires them to do so. Grotius does not give an example, but one could think of the situation in which non-Christians (e.g., Jews) have been driven from their homes and can find a refuge only in a Christian state.321 Moreover, as Grotius emphasizes, the conclusion that the believers should not ‘voluntarily’ (sponte) live together in one state with non-believers applies especially to those ‘who have departed from the church’.322 In other words, in an ideal situation, no state should be shared with heretics or apostates. However, in existing states, the believers are often already living together with heretics and apostates, which in itself should not be considered a violation of Christian law, especially if the latter are encouraged to return to the true religion.

Grotius’s conclusion in De societate that a faithful people may live together in one state with non-believers (albeit not voluntarily) may have informed his later arguments regarding the admittance of Jews to Holland and West-Friesland. In his Remonstrantie, Grotius begins by presenting several reasons for a Christian government not to admit religious minorities such as Jews. Most importantly, as Grotius observes, ‘religious unity is the greatest strength of a powerful state’, and it is therefore ‘not advisable to receive people in a country whose religion differs so much from ours’.323 The greatest risk is that the presence of Jews will ‘instill doubt in the weak-minded regarding the principal points that are necessary for our salvation’.324 In other words, admitting the Jews may increase religious division in a Christian state and lead to apostasy if their presence causes the ‘weak-minded’ to turn away from the true faith. However, as Grotius explains, there are also ‘excellent arguments’ for admitting the Jews, which ‘perhaps ought to take priority over the previous ones’.325 Most importantly, the believers have a duty to contribute to the (voluntary) conversion of the Jews, ‘which will not come about if the Jews are forbidden to live among Christians’.326 In Grotius’s view, the Jews should preferably live among Reformed Christians, who have turned away from (Catholic) idolatry and iconolatry; otherwise, their conversion to Christianity cannot be expected (especially since the Jews themselves reject the Catholic worship of statues). Apart from these religious arguments, Grotius gives another, more principled reason for admitting the Jews: referring to Justinian’s Digest, he observes that ‘nature has established a kind of kinship between all people’.327 From this natural kinship follows a duty for all nations to receive strangers and to treat them well.328 As this duty originates from natural law, it applies independently of religion: hence, the States of Holland and West-Friesland have a duty to provide hospitality to the Jews, irrespective of their religious ‘errors’.

For Grotius, the state is an example of an unequal public society, as citizens are subject to the authority and jurisdiction of their government. By contrast, the relationship between servants or slaves and their masters is an example of an unequal private society, as slaves or servants are dependent on their masters, whose commands they are required to obey. As Grotius explains in De societate, in unequal societies such as these, the faithful can either be the superior or the inferior party. Whether the believers are allowed to join unequal societies with non-believers generally depends on whether it contributes to the spread of the Gospel, or, conversely, entails the risk of apostasy. Hence, Grotius’s sixth proposition is that ‘[i]t is permissible for the faithful to have non-believers as servants and even as slaves’.329 As evidence Grotius refers to a passage in Aquinas’s Summa theologiae, where it is stated that ‘Christians can have unbelievers, either Jews, or pagans, or Saracens, for servants’.330 Aquinas gives the following reason: ‘There is more probability that a servant who is ruled by his master’s commands, will be converted to the faith of his master who is a believer, than if the case were reverse: and so the faithful are not forbidden to have unbelieving servants’.331 The believers may thus have non-believers as their servants or slaves, because it contributes to their conversion to Christianity. However, Aquinas makes an exception for situations in which the master, by communicating with his infidel servant or slave, may himself be persuaded to give up the Christian faith. In those cases, the master should send his infidel servant or slave away, to prevent the risk of apostasy.332

In the propositions and conclusions that follow, Grotius draws a parallel between the state as an unequal public society and the master-slave relationship as an unequal private society.333 Just as the believers may generally have non-believers as their servants or slaves, a Christian government may in general accept non-Christians as its subjects. Grotius’s seventh conclusion is that it is ‘equally permissible for a faithful magistrate or people to accept an infidel people under its authority’.334 The same reason applies to the state as applies to the master-slave relationship: there is more probability that non-Christians will convert to Christianity if they are subject to a Christian government than if the case were reverse, for, as subjects of a Christian government, they will be inclined to adopt the faith of their rulers. Hence, a Christian magistrate or people may in general accept an infidel people under its authority, unless it entails the risk of apostasy. Here Grotius formulates the general principles that he will later, in his Remonstrantie, use as arguments for admitting Jews to the Dutch provinces. As we have seen, the ‘principal reason’ for admitting the Jews is that it will contribute to their (voluntary) conversion to Christianity.335 As the Jews become subject to a Christian government, it is more likely that they will convert to Christianity, especially if they are allowed to live among Reformed Christians, who have rejected Catholic idolatry and the worship of statues.

These passages in De societate show that unequal societies between the believers and non-believers – whether the state as an unequal ‘public society’ or the master-slave relationship as an unequal ‘private society’ – are allowed only if the believers are the superior and the non-believers the inferior party. However, in his seventh proposition, Grotius makes an exception to this rule: ‘It is permissible for the faithful to lend his services to the faithless’.336 Grotius refers to the locatio-conductio contract of Roman law, which was, among other things, a labor-contract or a contract for lending services.337 If the believers conclude such contracts with non-believers, they have a duty not to endanger the Christian faith, in accordance with Grotius’s second premise. This implies that they should refrain from entering into contracts that entail the risk of apostasy (however, contrary to what Borschberg states, it does not mean that they may one-sidedly ‘break’ or terminate existing contracts).338 To prove his proposition, Grotius refers to the examples of Joseph, who served as an overseer of the house of Pharaoh, and Daniel, who lent his services to the infidel king Nebuchadnezzar.339 Grotius also mentions a passage from Paul’s Letter to the Philippians, which suggests that the household of the (pagan) Roman emperors had included Christian saints.340 The examples mentioned by Grotius all pertain to believers of particularly strong convictions, such as Christian saints, who are not at risk of losing their faith because of their dependence on infidel employers (even if they are kings or emperors). However, the proposition that the believers may lend their services to non-believers does not necessarily apply to ordinary believers, who may be of ‘weak conviction’, and thus exposed to the risk of apostasy. As Grotius implies, the believers should refuse to work for infidel employers if they are at risk of losing their faith.

By contrast, those subjected to slavery do not have the possibility of refusing to work for non-Christian masters.341 Indeed, as Grotius emphasizes in his eighth proposition, ‘[i]f a faithful [slave] is a slave [servus] of an unfaithful master, he must remain so’.342 To prove that Christian slaves have a duty to stay with their non-Christian masters Grotius refers to a passage from Paul’s first letter to Timothy, where the Apostle admonishes servants ‘under the yoke’ to honor their masters.343 According to Grotius, Christian servants and slaves are thus in general required to obey their non-Christian masters. However, Grotius also maintains that the magistrate may issue a law prohibiting non-Christians from having Christians as their slaves. In this context, he refers to a statute from the Codex Theodosianus, according to which ‘no heretic, infidel or Jew may keep, possess, or circumcise a Christian as a slave’.344 In his Remonstrantie, Grotius mentions the same Roman statute, observing that it ‘was expressly forbidden by the ancient emperors that Jews kept Christians as their slaves’.345 He explains that when the use of slaves began to decline, the laws prohibiting Jews from having Christian slaves were analogously applied to domestic servants, in the sense that Jews were not allowed to employ Christian servants or maids in their households.346 In a note, Grotius distinguishes between those situations in which Christians lend their services inside the homes of their Jewish employers, and those in which they are allowed to work outside their employers’ homes. If they are working inside the homes of their Jewish employers, there is a greater risk that they will be induced to apostasy. For this reason, Jews may employ Christian midwives and wet nurses for their children, but only outside their homes.347

Once again, Grotius’s main source seems to be Aquinas, who in his Summa theologiae had addressed the question whether non-believers could possess Christian servants or slaves in the context of a discussion of the more general question whether they could exercise authority and dominion (that is, rights of ownership) over the believers.348 As Aquinas explained, unlike those hired for their services (e.g., wage laborers), ‘slaves are subject to their masters for their whole lifetime, and are subject to their overseers in everything’.349 Therefore, it is more dangerous if non-Christians possess Christian slaves than if they employ Christian wage laborers. Because of their complete dependence on their masters, slaves can more easily be forced or induced to give up their Christian faith. As Aquinas emphasized, if non-Christians already possessed Christian slaves, then their rights of ownership had to be respected, as divine law did not cancel the man-made laws of ownership that followed from natural reason.350 However, to prevent apostasy, the church could issue a law invalidating existing rights of ownership of non-Christian masters over their Christian slaves.351 In other words: Christian slaves had to stay with their non-Christian masters, unless the magistrate (or the church exercising temporal jurisdiction) issued a law invalidating non-Christian ownership of Christian slaves. In De societate, Grotius refers to the same biblical source as Aquinas to conclude that in general Christian slaves have a duty to stay with their non-Christian masters, unless a law has been issued prohibiting non-believers from having Christian slaves.352

However, according to Grotius’s ninth proposition, Christians are not allowed to submit themselves voluntarily as slaves to Christian masters, and even less so to non-Christian masters, except in cases of necessity.353 Grotius does not mention a source for his proposal. Vitoria, to whom he refers elsewhere in De societate, had maintained that it was not lawful for Christians to enslave their fellow-Christians.354 Vitoria had referred to slavery under the law of peoples (ius gentium), whereby those captured in a formal public war (as well as their children) were enslaved by their captors.355 However, Grotius’s ninth proposition in De societate seems to relate to a different type of slavery. As Grotius would later explain in De iure belli ac pacis, under natural law, one could become a slave by ‘voluntarily’ submitting oneself to a master, for instance, by offering oneself as a slave to one’s creditors to obtain remission of one’s debts.356 In Grotius’s opinion, this condition was not unduly severe, if one received nourishment and other necessities of life in return for one’s (lifelong) service. Parents could even sell their children into slavery, but only in case of ‘necessity’.357 However, as Grotius suggests in the ninth proposition of De societate, Christians are not allowed to submit themselves in this manner as slaves to other Christians, let alone to non-believers. An exception should be made in cases of necessity, if they have no other way to preserve their lives (for instance, if they or their children would otherwise die from starvation). Crucially, Grotius implies that in such cases of urgent necessity, the believers may offer themselves as slaves to non-Christian masters. The reason is briefly explained in the reading notes: ‘it is better to serve than to perish’.358

Like Aquinas and Vitoria, Grotius understands the question whether non-Christians may have Christian slaves as a sub-question of the more general question whether they may exercise dominion and authority over Christians. Thus, in the final conclusions of De societate, he draws a parallel between the enslavement of Christians and their subjection to infidel rulers. According to his eighth conclusion, ‘it is incumbent upon a faithful people to obey an infidel prince or magistrate. However, a law can be made in the state so that a prince who has become unfaithful may be deposed from his leadership’.359 Grotius does not indicate the source of his conclusion, but it may have been Vitoria, who, in his lecture on civil power (De potestate civili), observed that ‘[i]f a Christian [ruler] apostatizes, the laws state that he forfeits all public power on the grounds of his apostasy’.360 Moreover, just as Christians may not voluntarily submit themselves as slaves to non-Christian masters, according to Grotius’s ninth conclusion, they may not voluntarily submit to infidel rulers.361 In a marginal note, Grotius refers to Paul’s First Letter to the Corinthians: ‘Dare any of you, having a matter against another, go to be judged before the unjust, and not before the saints?’362 The same verse had been quoted by Aquinas to argue that non-believers could not exercise authority or dominion over the faithful (at least, not if it was established for the first time).363 In addition, Grotius cites a passage from Deuteronomy, where the believers are warned not to accept a foreigner as their king, but a brother364 – a passage also cited by Vitoria.365 On Grotius’s reading, these biblical verses demonstrate that the believers are not allowed to voluntarily submit themselves to an infidel prince or government, just as they are not permitted to voluntarily submit themselves as slaves to a non-Christian master.

Grotius’s ninth conclusion that the believers may not voluntarily submit to an infidel ruler is followed by an amplification and three limitations. The amplification is based on the distinction made in his seventh premise: Christians may not voluntarily submit to the authority of non-Christian rulers, and even less so to that of heretics and apostates.366 Apart from the risk that they can be forced or induced by an infidel ruler to give up their faith, there is a ‘special reason’ not to submit to apostates and heretics, for they must be encouraged to repent.367 Grotius also proposes three limitations to his conclusion. The first is that it does not seem to be forbidden that the believers entrust themselves to the protection of infidel rulers if they can thereby ‘save [their] religion and some freedom’.368 Grotius gives the examples of Jacob, who had entrusted himself and his people to Pharaoh,369 and Solomon, who had made some of his people tributary to king Hiram in exchange for the delivery of cedar trees, which were needed to build a temple for God.370 A second limitation follows from Grotius’s fifth premise: the believers may be required by a ‘special command of God’ to submit to the authority of infidel rulers.371 Grotius gives the example of the Jews, who were ordered by God to serve the king of Assyria.372 The third limitation is formulated more cautiously: the believers may ‘probably’ submit to infidel rulers in ‘case of necessity’, if doing so is the only way to preserve their lives.373 The parallels with Grotius’s treatment of slavery are clear: just as the believers are not allowed to submit themselves as slaves to non-Christian masters, unless they are forced to do so by an urgent necessity, they may not submit to the authority of an infidel prince or magistrate either, except in case of necessity, for instance if they would otherwise be killed. With these reflections on slavery and the state, Grotius ends his treatise on public societies with non-believers.

8 Conclusion: Grotius’s Contribution

Although Grotius was not the first to devote attention to the question if and to what degree it was permissible for Christians to enter into legal partnerships with non-Christians, he was the first to address this question in a comprehensive and systematic manner. By bringing together insights from older legal and theological debates on such diverse topics as marriage, slavery, alms-giving, usury, and just war, he attempted to articulate the underlying principles that governed public and private partnerships between Christians and non-Christians. As Grotius emphasized in De societate, ‘errors of faith’ did not diminish the rights and obligations that existed under the law of nature: this implied that Christians could have legal obligations and rights towards non-Christians and even heretics. Grotius concluded that, under natural and divine law, it was permissible for the believers to enter into private and public partnerships with non-believers as long as it did not undermine the authority of God or the Christian religion. These partnerships were based, not only on the natural duty to protect others from harm, but also on the religious obligation to treat all human beings, including those of other creeds, as neighbors. However, according to Grotius, partnerships with non-believers were not permissible if they entailed the risk of apostasy: for that reason, Christians were not allowed to voluntarily submit themselves as slaves or subjects to the authority of non-Christian masters or rulers. Moreover, preference had to be given to the faithful over non-believers, and ties of friendship and familiarity with heretics had to be avoided. Under these conditions, public and private partnerships with non-believers and heretics were permissible and even commendable.

Grotius’s main contribution in De societate was to provide a new justification for military alliances between Christians and non-Christians. Medieval jurists and theologians had focused on the question whether it was permissible for Christians to use the aid of non-Christians in a war against other Christians.374 As we have seen, they had generally condemned such alliances, especially if they were aimed against Christians. However, an exception was made in cases of ‘urgent necessity’, when the aid of non-Christians was necessary to defend one’s own life and possessions. The sixteenth-century Spanish scholastics had proved less reluctant to accept military alliances with non-Christians, as they recognized their importance for empire-building in Asia and the Americas. According to Vitoria, the believers were generally allowed to enter into military alliances with non-believers, not only to protect their own rights, but also to protect the rights of their (infidel) allies. However, Vitoria had referred to alliances with non-Christians that were aimed against other non-Christians, and he had not discussed alliances aimed against Christians. By contrast, in De societate, Grotius concluded that an alliance for protecting the ‘infidels’ from oppression could also be justified if it was aimed against Christians, or, as he carefully put it, against those who ‘wish to be considered as faithful.’375 As Grotius explained, the duty to protect non-Christians from oppression originated from natural law, which applied irrespective of religious ‘errors’. It was confirmed by the Gospel, as Christ himself had taught the believers to extend their good deeds to all human beings, including the most alien.376 Hence, Christians had a duty to protect non-Christians from unjust oppression, even if those who oppressed them were Christians.

Grotius’s justification of military alliances with non-Christians was no doubt prompted by his attempts to defend the Dutch policies of treaty and alliance-making in Asia and the East Indies.377 As Grotius had explained in De iure praedae, Christians (e.g., the voc) had the right to enter into military alliances with non-Christians (e.g., the king of Johor), even if they were directed against other Christians (e.g., the Spaniards and the Portuguese).378 In Grotius’s understanding, the voc’s alliances with East Indian rulers were essentially defensive alliances, which served to defend the rights of the Dutch (e.g., the rights to free navigation and trade) as well as those of their non-Christian allies (e.g., the right not to be unjustly oppressed). Grotius referred to the voc’s alliances with East Indian rulers in a memorandum which he prepared in 1607 in view of the peace negotiations between the Dutch Republic and Spain. As he pointed out, the voc had entered into these alliances on behalf of the Dutch Estates General; if a peace agreement with Spain would force the voc to end its activities in the East Indies, then its allies would be left unprotected, which would seriously harm the Dutch reputation.379 In the context of the peace negotiations, Grotius’s defense of military alliances with non-Christians could thus serve to convince the Estates General (as well as international audiences) to support the outcome desired by the voc directors, namely that the conclusion of a peace treaty with Spain should not force them to give up the East Indian trade.

However, in De societate, Grotius not only contributed to the debate about treaties and alliances with non-Christian rulers in the East Indian context. He also intervened in the domestic debate about the legal conditions under which non-Christian minorities (e.g., Jews) could be admitted to the Dutch Republic. As Grotius emphasized in De societate, the ‘highest public partnership’ was the ‘union of the state’, and there was ‘no doubt’ that Christians could live together in one state with non-Christians.380 Building on Cicero’s definition of the state as an ‘association’ that originated from nature itself, Grotius argued that it could encompass both the faithful and non-believers. He concluded that it was generally permissible for a Christian government to ‘accept an infidel people under its authority’.381 Indeed, if non-Christians were admitted to a Christian state, it was more likely that they would convert to Christianity than if they remained subject to non-Christian rulers. In his Remonstrantie, Grotius would use these same arguments to advocate the admission of Jews to the Dutch provinces. The principal reason for admitting the Jews was that it would contribute to their voluntary conversion to Christianity, which would not come about if the Jews were ‘cut off from the conversation with Christians’.382 As Grotius concluded, under natural and divine law, the states of Holland had a duty to offer protection to the Jews, irrespective of their ‘errors of faith’. The arguments that applied to alliances between the believers and non-believers in the East Indian context thus also applied in the domestic context: Christians had a duty to protect non-Christians from unjust oppression, even if those who oppressed them were Christians.

Grotius also used some of the arguments he had developed in De societate in De iure belli ac pacis. In chapter 15 of book 2, he returned to the ‘frequently discussed question’ whether Christians were allowed to enter into treaties with ‘those who are strangers to the true religion’. As Grotius explained, it was ‘in no degree a matter of doubt’ that such treaties were permissible under the law of nature, because ‘the right to enter into treaties is so common to all men that it does not admit of a distinction arising from religion’.383 However, it was more questionable whether treaties with non-believers were allowed under Christian law. Recalling one of the main conclusions of De societate, Grotius observed that it was generally permissible under Hebraic law to make treaties with non-believers to prevent harm, mentioning the treaty between Jacob and Laban as example.384 Treaties of friendship and trade were permissible as well, as was proven by David and Solomon’s treaties with Hiram.385 Grotius continued by quoting Juvenal’s critique of the Jews, who had refused to show strangers the way to a well, explaining that ‘the example of pointing out the way stands for the benefits [beneficia] which are least troublesome and costly, which Cicero and Seneca say ought to be granted even to strangers’.386 Exactly the same combination of sources – Juvenal, Cicero and Seneca – had been discussed in De societate to support the proposition that the believers should do good, i.e., provide assistance and protection, to non-believers.387 As Grotius argued in De iure belli ac pacis, ‘alliances for purposes of war’ were permissible as well, as was demonstrated by the example of Abraham who had provided military assistance to the ‘impious Sodomites’.388 It was true that the Old Testament also mentioned examples of rulers who had been punished for allying with non-believers, but, on Grotius’s reading, these were exceptions to the general rule that alliances with non-believers were allowed by divine and natural law.389

There are also clear parallels between De societate and the section in De iure belli ac pacis, in which Grotius examined whether treaties with ‘those who are strangers to the true religion’ were in accordance with the Gospel. He began by observing that the law of the Gospel had not changed Hebraic law, in the sense that it remained permissible for the believers to make alliances with non-believers. Citing the Sermon on the Mount, and referring to Vitoria (amongst others),390 Grotius explained that the law of the Gospel had extended ‘even greater favor to treaties by which those who are strangers to the true religion receive help in a just cause; for the doing of good to all men, whenever there is opportunity, has not only been left free and praiseworthy, but has even been enjoined by precept’.391 His phrase echoed one of the main conclusions of De societate: doing good to all men, including those of other creeds, was not merely a right, but depending on the circumstances, it could also be an obligation. However, the obligation to do good to non-believers was not without limitations: thus, preference had to be given to the faithful over non-believers: ‘we should be doers of good to all, but particularly to those who share the same religion’.392 Moreover, cultivating ties of friendship and familiarity with heretics and apostates was allowed only if it ‘furnishe[d] the hope of their correction’.393 Exactly the same limitations had been formulated in De societate.394 In De iure belli ac pacis, Grotius made the permissibility of partnerships with non-believers subject to the same conditions he had proposed in De societate: the believers were not allowed to voluntarily submit themselves to the authority of non-believers or to conclude marriages with them, as it might lead to apostasy.395 For that same reason, ‘too great intimacy’ (e.g., living together) with non-believers had to be avoided, so that it did not bring ‘contamination to the weak’.396 Grotius recalled the premise he had formulated in De societate: it was never permissible to engage in partnerships with non-believers that could harm the authority of God and the Christian religion: ‘[f]or as a matter of first importance the kingdom of heaven is to be sought, that is, the spread of the Gospel’.397

However, notwithstanding these parallels, there was also an important difference between the conclusions presented in De societate and De iure belli ac pacis. As we have seen, one of the main conclusions in De societate had been that Christians were allowed to enter into military alliances with non-Christians, even if they were aimed against other Christians. The faithful could thus wage a just war to protect non-believers from unjust oppression, even if those who oppressed them were themselves Christians.398 Strikingly, this conclusion from De societate did not reappear in De iure belli ac pacis. Instead, Grotius quoted Fulk, the Archbishop of Reims (883–900), who had warned Charles the Simple not to enter into alliances with the ‘enemies of God’, arguing that it made ‘no difference whether any one allies himself with the heathen or denies God and worships idols’.399 The implication was that Christians were not allowed to use the assistance of non-Christians in a war against their fellow-believers.400 Moreover, Grotius now maintained that all Christians had a duty to contribute to a league against the enemies of Christianity.401 While one of Grotius’s main conclusions in De societate had been that Christians could enter into military alliances with non-Christians, even against other Christians, in De iure belli ac pacis he emphasized the duty of the faithful to join a league with their fellow-believers against the ‘infidels’. He gave the example of the league that had been made ‘under the leadership of the emperor of the Holy Roman Empire’, perhaps a reference to the league formed by Frederick iii of Habsburg and the papacy against the Turks, after the fall of Constantinople.402 Although Grotius still defended military alliances with non-Christians in non-European contexts (e.g., the voc’s alliances with native rulers in Asia and the East Indies),403 he now explicitly rejected such alliances in the European context, calling instead for a league of all Christian nations against the ‘enemies of Christianity’ (e.g., the Ottoman empire).404

The similarities and differences between Grotius’s De societate and his other writings (including De iure belli ac pacis) allow us to trace the development of his ideas about alliances with non-Christians. As we have seen, in De iure praedae, Grotius’s aim had been to defend the voc’s policies of alliance-making in the East Indies, and more specifically, the seizure of a Portuguese vessel, the Santa Catarina, as a just prize taken on behalf of a non-Christian ally, the Sultan of Johor. As Grotius explained, the right to enter into alliances with non-Christians followed from the natural laws of non-offensiveness and protection, which prescribed that others should be protected from harm, irrespective of religious differences. In the context of the peace negotiations with Spain, Grotius drafted a second treatise, De societate publica cum infidelibus, in which he explained why public partnerships with non-Christians – including military alliances – were allowed not only by natural law, but also by Christian law: the natural duty to protect others from harm was confirmed by the Gospel, according to which all human beings should be treated as neighbors and children of God. As we have seen, Grotius’s aim was no longer only to justify the voc’s policies of alliance-making in the East Indies, but to write a more general treatise on private and public partnerships with non-Christians, which was also relevant to the domestic debate about religious minorities in the Dutch Republic. Thus, in his Remonstrantie, he referred to the natural duty to protect non-Christians from oppression to argue that the States of Holland and West-Friesland had an obligation to offer a refuge to the Jews. Finally, in De iure belli ac pacis, Grotius focused on the European context, arguing that all Christians (i.e., Catholic and Protestant nations) had a duty to join a league against the enemies of Christianity. As an exile in Paris, his hope was that if all Christian nations would join a league against the Ottomans, it would contribute to overcoming the internal divisions of Christianity, thus laying the foundations for a lasting peace in Europe.405

Picture 2
Picture 2

Third page of De societate publica cum infidelibus, written in the hand of Grotius. This page contains an explanation of the second proposition, followed by three limitations, which have been renumbered by Grotius. The old numbering is still visible. Leiden University Library, ms bpl 922 Ie, fol. 315r.

Citation: Grotiana 45, 1 (2024) ; 10.1163/18760759-20240001

 

Synopsis

Fol. 314r

 

Introd.: Main question: if and to what degree it should be allowed to Christians to enter into a partnership with non-believers, or even heretics

Prem. 1: An ‘error of faith’ does not change those things that pertain to natural law

Prem. 2: One must avoid all things that appear to go against divine glory and the true religion

Prem. 3: Even in things that are generally permitted, we should distinguish what is decent from what is offensive

Prem. 4: If extreme urgency compels us, many things are done justly that are otherwise unjust

Prem. 5: Things that are generally called just or unjust sometimes cease to be so due to a special calling

Prem. 6: Many actions that are not unlawful in themselves are condemned because of the inner state of mind of the actor

Prem. 7: Distinction between those who belong to the Church and those who do not

Prem. 8: Distinctions between different types of alliance: ἐπιμαχία/ συμμαχία, private/ public, equal/unequal, superior/ inferior

Prem. 9: An alliance for purposes of war can be just

Prem. 10: Universal [alliance] should not be just without exception

 

Fol. 314v

 

Prop. 1: To refrain from harming non-believers and heretics in general is not only permissible, but even necessary (from prem. 1)

Concl. 1: It is permissible for both private and public persons to enter into a pact with non-believers or heretics with the aim not to harm one another

Prop. 2: Good deeds, duties, and trades may rightly be cultivated between the believers and non-believers or heretics, as they also originate from nature (as in prem. 1)

Ampl.: It is not only allowed to do good to non-believers or heretics, but according to the circumstances even necessary, when we can help them without great disadvantage, or when they ask our help themselves

 

Fol. 315r

 

The idea of this proposition should be restricted by these additions:

1 lim. [1]: Greater charity must be shown towards the faithful than towards the unfaithful

2. lim. (ex prem. 2): Unless it appears to harm the [true] faith. Usury may be taken from a stranger, but not from a brother. The closer the connection, the greater the benefits should be

1 lim. prop. 3 [2]:406 Likewise greater friendship and familiarity should be cultivated with the faithful than with the non-believers

 

Fol. 315v

 

1 prem. in prop.:

In prop.: There are two kinds of non-believers or ἑτεροδόξοι: those who never belonged to the Church and those who have departed from it, or are expelled by an ecclesiastical judgement

2 lim. prop. 3: Christians must abstain from intimate relations and social intercourse with those who have fallen from the Church or have been condemned by its judgement. However, this does not apply in case of necessity, or even utility, when heretics are approached with the hope of conversion

3 lim. ex prem. 3: One should not enter into a very close familiarity with non-believers or heretics without reason: those who converse with non-Christians should take care on all occasions, so that they try to bring them to good sense by doctrine and example

Let us first consider equal partnerships, of which there are different degrees

Prop. 3: It is permissible to have some friendship and familiarity with non-believers and heretics

Prop. 4: The highest union is in marriage. In case of a concluded marriage, it is not permissible to separate from a non-believer

Lim.: However, it is permissible for a faithful magistrate to make a law by which the marriage of a faithful person with an unbeliever is invalidated, but only for just reasons

Prop. 5: Marriages with non-believers that are still to be concluded should be condemned, because the main purpose of marriage is the education of children to the glory of God, which is not a little hindered by such marriages

Lim.: An exception should be made in case of a special calling (which may perhaps be said of Esther)

 

Fol. 317r

 

Public alliances

Concl. 2: Treaties with non-believers are rightly entered into for the sake of friendship, commerce, travels, and other benefits which are mutually guaranteed

Lim.: Unless there is a special reason, for instance, in case of apostasy

In prem.: There are two kinds of military alliances: defensive and offensive. Such alliances are unjust if war is agreed to without exception, unless the cause is just

Concl. 3: In a just war, the non-believers are rightly defended by the faithful, even if those who oppress the non-believers consider themselves as faithful. This work is not only permitted, but also highly praiseworthy, and because of the circumstances often necessary

Lim.: An exception should be made if God wants to punish particular nations for infidelity

Concl. 4: If they fight a just war, the faithful may use the help of non-believers. Conditions: 1. As long as no occasion is thereby offered to the non-believers for harming the truth; 2. As long as it is not done out of distrust or against a special command

Concl. 5: The highest public partnership is the union of the state. A faithful people can remain in one state with non-believers

Concl. 6: However, whether a [faithful] people may voluntarily enter into such a community with non-believers is more difficult to say. An analogy can be made with marriage. Thus, sharing a state with non-believers should be avoided outside cases of necessity, and especially with those who have departed from the Church

Prop. 6: It is permissible for the faithful to have non-believers as servants and even as slaves

 

Fol. 317v

 

Conc. 7: It is equally permissible for a faithful magistrate or people to accept an infidel people under its authority

Prop. 7: It is permissible for a faithful [person] to lend his services to non-believers

Prop. 8: A faithful [slave] who is a slave of an unfaithful master must remain so. However, the magistrate may issue a law prohibiting non-believers from having the faithful as slaves

Prop. 9: It is not easily allowed to submit oneself voluntarily in slavery to a believer, and even less so to a non-believer. However, in case of necessity, it does not seem to be prohibited

Concl. 8: A faithful people has a duty to obey an infidel prince or magistrate. However, a law can be made in the state to depose a prince who has become unfaithful

Concl. 9: It is hardly permissible [for a believer] to submit to such [an infidel ruler]

Ampl.: It is less permissible to submit to an apostate than to a non-believer

Lim.: It does not seem to be forbidden to place oneself under the protection of an infidel [ruler], in order to save religion and some freedom

Lim.: It is permissible (even without exception) to submit oneself to a non-believer where there is a special command of God

Lim.: It is (probably) permissible to submit to a non-believer in case of urgent necessity

 

Editorial principles

  1. 1.Exact transliteration of the text of Grotius’s treatise, with a few exceptions:
  2. u/v: according to modern usage; consonantal u is printed as v, v used as a vowel is printed as u
  3. i/j: the letter j has been changed in i in all Latin words.
  4. 2.All accents in the Latin text have been omitted.
  5. 3.Punctuation has been adapted to modern usage.1
  6. 4.Grotius’s capitals have been retained, except for sentences after a period, which always open with a capital.
  7. 5.Words or letters between square brackets […] are additions by the editors.
  8. 6.Round brackets (…) are printed as found in the text or are silently added in a few cases for the sake of clarity.
  9. 7.Textual commentary has been added to the Latin transcription, historical commentary to the English translation.

Transcription

Hugo Grotius, De societate publica cum infidelibus

(Leiden, University Library, ms. Cod. bpl 922)

 

xviii N 922 i e

Fol. 314–318: Hugonis Grotii Theses autographae de Societate cum infidelibus publica; accedunt Adversaria huc pertinentia, folia 6.2

 

Fol. 314r

De societate publica3 cum infidelibus

 

Vetus est quaestio et nostra hac aetate non minus agitata, an et quatenus hominibus Christianis liceat cum Infidelibus, aut etiam Haereticis inire societatem. Ea videtur a plerisque exemplis magis quam rationibus, ac praeterea non satis distincte esse tractata. Quare tentandum arbitramur an ei lux aliqua nova discussione afferri possit. Antequam autem ad argumentum veniamus haec praefabimur.

 

1. Cum duplex sit Humani generis societas, altera ex creatione, altera ex recreatione, sive naturalis et Ecclesiastica, et ad prioris illius conservationem institutum sit Ius illud quod Naturae dicimus, tum primarium, tum secundarium, sciendum est errorem in fide nihil eorum immutare quae ad ius Naturae et universalis illius societatis tuitionem pertinent, quo argumento utitur Thomas 2[a], 2[ae], quaest[io] 10, art[iculus] 10.4

 

2. Omnia ea quae apparet adversatura divinae gloriae et verae religioni adeo distincte sunt5 cavenda, ut neque spes, neque metus ullus contra persuadeat. Sed maneat illud: Quaerite primum regnum caelorum.

 

3. Etiam in his quae in universum libertati nostrae permittuntur maxima est habenda ratio6 eius quod deceat, aut offendat.

 

4. Sed tamen in his ipsis si extrema necessitas urgeat multa recte fiunt7 quae alioqui vitio non carerent.

 

5. Tenenda est et haec generalis exceptio quae iusta aut iniusta dicuntur, talia interdum esse desinere ob specialem vocationem.

 

6. Ac multas actiones per se non illicitas damnari propter internam constitutionem animi facientis. 2 Sam. 33; 2 Reg. 20 in fine.

 

7. Dist[inctio] Inf[idelium] 1:8 alii ad Ecclesiam pertinuerunt,9 alii non.

 

8. De societate duplici: ἐπιμ[αχία], συμ[μαχία]. Societas Privata – publica; aequalis – inaequalis; Superior – Inferior.

 

9. Societas bellica iusta esse potest.

 

10. Universalis sine exceptione iusta esse non sit.

 

Fol. 314v:

His praemissis prima sit propositio:

 

i. Prop[ositio]. Abstinere a noxa in Infideles, et haereticos universaliter non modo licet Christianis sed etiam necesse est; ex primo Praemisso. Nemini enim inferendum malum lex Naturae praecipit, idque Christus millies inculcat. Unde sequitur Conclusio:

 

i. Concl[usio]. Tum privatis tum publicis personis licet inire foedus cum Infidelibus aut Haereticis de non offendendo utrinque.

Quicquid enim recte fit idem recte futurum stipulamur et promittimus. Tale fuit foedus Abrahami et postea Isaaci, piorum hominum, cum Abimeleco profano Rege; idque haereditarium. Gen. 21 v. 27 et 26 v. 29. Item Iacobi cum Labane socero. Gen. 31 v. 49. Tale item Davidis et Hirami, Tyrionum Regis: 2 Sam. 5. 11. Itemque Solomonis et Hirami, quod manifeste Scriptura approbat. 1 Reg. [5 v. 26]; 2 Sam. 5 v. 12.

 

Excipe eos fideles, qui ex vocationis praescripto tenentur Infideles punire. Itaque Deus cum Amalecitis (Deut. 17. 16) et cum sex devotis populis vetat constitui foedus pacis (Deut. 25. 17),10 quia ad illos puniendos Deus populum suum elegerat. Ideoque hoc interdictum ex speciali, non ex generali causa venire inde etiam apparet, quia contra cum11 Ammonitis et ipsis Infidelibus foedus pacis ipse Deus a populo fideli servari voluit. Deut. 2. 19.

 

Secunda propositio sit:

 

ii. Prop[ositio]. Beneficia, officia, commercia charitatis, civilitatis et utilitatis ergo inter Fideles et Infideles aut haer[eticos] ultro12 citroque recte colantur. Sunt enim et haec ex Natura prodeuntia, atque ideo cunctis hominibus communia, ut in 1 Praem[isso].

 

Ampl[ificatio]. Adde non tantum licitum esse benefacere Infidelibus aut haer[eticis], sed etiam secundum circumstantias saepe necessarium puta, cum sine magno incommodo nostro commodare ipsis possumus, praecipue vero cum ipsi opem nostram exposcunt.

 

His positionibus Iudaei veteres non assentiebantur, quos dicit Iohannes Evangelista ([Ioh.] 4. 9)13 non solitos συγχρῆσθαι, hoc est consuetudine ulla uti cum Samaritanis, utpote ἑτεροδόξοις; ideoque Christus in Parabola ipsis ostendit proximi appellationem etiam ad hos pertinere. Luc. 10. 36; Act. 10. 28. Hunc Iudaeorum errorem etiam Satyra notat:

 

Non monstrare vias eadem nisi sacra colenti;

Quaesitum ad fontem solos deducere verpos.

 

Fol. 315r:

Hoc autem exemplo viam monstrandi, ut Cicero14 Ennii versum applicat (Off. 1. [51]), ea cuncta intelligi debent quae sine detrimento aliis commodari possunt; eaque praestanda dictat ipsa Naturae lex etiam ignoto cuique. Atque eadem ferme apud Senecam invenies, ubi quaerit15 an et improbis et ingratis benefaciendum sit; aitque Aristotelem imitatus, dari quaedam non homini sed humanitati. De Ben[eficiis] 4. 29. Quod et Herodes Atticus apud Gellium exprimit. Idem tractat Seneca De Benef[iciis] 4. 28. Ac Christus certissimo argumento docet beneficia nostra etiam ad alienissimos porrigenda, cum ipse Deus Optimus Maximus Solem suum oriri faciat et pluat super bonos et malos: ubi per Solem et pluviam cuncta Naturae bona intelligi voluit. Sed et ipse exiguum quamvis beneficium, aquae haustum a Samaritana muliere accipere non est dedignatus. Paulus vero ab Infidelibus Romanis etiam praesidium impetravit. Haec ad beneficia pertinent. Ad officia civilitatis illud: Si quis vos invitat Infidelium, et vultis ire, quicquid vobis apponitur manducate. 1 Cor. 10. 27. Obi[ectio] Deut. 5 et ratio adiecta.16 Quod ipsum quoque contrarium est Iudaeorum institutis, qui Christum eo nomine culparunt quod cum hominibus ab Ecclesia alienis convivia frequentaret. De commerciis quoque manifestum est. Abrahamus et Iacobus agros ab Infidelibus emerunt. Et alia exempla innumera suppetunt: quanquam et in hac parte quidam Iudaeorum non recte sensisse videntur, unde natum credibile est errorem discipulorum qui Christi monitum de cavendo fermento ita interpretabantur quasi panes a Pharisaicae superstitionis hominibus comparare vetarentur.

 

Huius propositionis sententia his additamentis17 restringenda est.

 

i. Limit[atio]. 1 [old number].18 Maior charitas erga fideles quam erga Infideles demonstranda est.19 Paulus ad Gal. 6. 10. Simus benefici erga omnes, praecipue vero erga domesticos fidei.

 

ii. Lim[itatio]. Nisi appareat secuturum unde20 damnum religionis; ex 2 P[raemissio]ne.21 Quo forte et illud veteris legis pertinet: Extraneo dabis in usuram; fratri autem non dabis. Ab alienigena exiges, Deut. 15. 3. Ratio autem patet quia in his praeter societatem Naturae, accedit societas gratiae. Quo autem arctior est colligatio, eo beneficia esse maiora debere ratio dictat. Iam quae v[ide] p[er] seq[uentia].22

 

i. Lim [itatio]. iii. Prop[ositio]. 2 [old number]. Similiter maior amicitia ac familiaritas cum fidelib[us] quam cum Infidelibus coli debet. Maximum enim amicitiae vinculum est studiorum consensio, praecipue circa res maximas. Hinc illa φιλαδελφία toties in Evangelio commendata. Arist[oteles].

 

Fol. 315v:

1 praem[issum/issio] in p[ropositione]m.23

 

In p[ropositione]m. Notandum et hic duplices esse Infideles sive ἑτεροδόξους; alios, qui ad Ecclesiam nunquam pertinuerunt; alios qui ab ea desciverunt, aut iudicio Ecclesiastico eiecti sunt. Probatur haec distinctio 1 Cor. 5 v. 12.

 

ii. Lim[itatio]. iii. Prop[ositio]. Qui ab Ecclesia defecerunt, aut eius iudicio condemnati sunt, ab horum familiari convictu et consuetudine abstinere24 Christiani debent: quia hoc ob rationem specialem ita constitutum est, ut ad pudorem et paenitentiam reverentur.25 Inde haereticum hominem post unam et alteram admonitionem vitari26 Apostolus praecipit ad Tit. 3. 10. Hoc tamen abstinendi praeceptum non ita destrictum est ut necessitatis casum, aut etiam utilitatem omnem excludat, cum sine dubio liceat Fidelib[us] interdum et hos spe conversionis accedere.

 

Sed et ab aliorum Infidelium consuetudine abstinere iis saltem expedit qui infirmitatis suae sunt conscii.27

 

iii. Lim[itatio] ex iii p[rae]m[isso/issione].28 Non admodum arcta familiaritas cum Infid[elibus] et Haer[eticis] sine causa ineunda, sed qui cum alterius generis Infidelibus29 conversantur diligenter omnibus occasionibus invigilare debent, ut ipsos et doctrina et exemplo conentur ad sanam mentem perducere. 1 Thess. 4. 12.

 

Iam quae societatis genera inter Fideles et Infideles esse possint videamus, tum privatim, tum publice, nam in utroque ferme eadem est ratio. Ac primum videamus in societate aequali; cuius diversi sunt gradus.

Primum gradum aequalem ponamus convictum et familiaritatem.

 

iii. Prop[ositio]. Licet amicitiam aliquam et familiaritatem cum Infid[elibus] et cum Haer[eticis] habere. Ex sup[eriore loco].30

 

iv. Prop[ositio]. Summa coniunctio est in matrimonio. Agitur autem aut de contracto aut de contrahendo. Contracto non licet ab Infideli divertere. 1 Cor. 7. 12.

 

Lim[itatio]. Quod tamen ita puto intelligendum, ut liceat Magistratui fideli ferre legem qua matrimonium fidelis cum Infideli nullum et irritum declaretur ita ut non obliget. Est enim in31 Magistratus potestate ob iustas causas contractus32 irritos facere. Talis lex cum apud Iudaeos fuerit, recte Esdras tempore αὐτονομίας Iudaeos ab Infidelium contubernio iussit discedere. [Esdras] c[ap.] 10.

 

v. Prop[ositio]. Si de contrahendo agatur in universum non possunt non damnari matrimonia cum Infidelibus: quia qui praecipuus est finis matrimonii educatio liberorum ad gloriam Dei in33 tali coniugio non parum impeditur.34 Ita ut locum hic suum habeat: illud nolite iugum ducere, ἑτεροζυγεῖν, cum Infidelibus. 2 Cor. 6. 13 [= 14]. Sc[aliger], Anim[adversiones] in Euseb[ium], 149. Solomon hoc nomine reprehenditur et Manassis frater summi pontificis dicitur sacerdotium tali coniugio polluisse. Neh. 13 v. 26 et 28.

 

Lim[itatio]. Excipe eos qui ad hoc vocantur specialiter, quod forte de Esthera dici potest. An idem obtineat in casu necessitatis, puta si quis continentiae dono non praeditus eo loco sit ut aliter uxorem habere non possit, consideratione indiget; nisi quod haud impie credetur Deum providere, ne sui fideles ad eas angustias coarctentur. Hic eius subiectio. De affinitate. Deut. 7.

 

Fol. 317r:

His similia in publicis societatibus procedunt.

 

Concl[usio] ii. Nam foedera cum Infidelibus amicitiae,35 commerciorum, itinerum aliorumque beneficiorum quae mutuo praestantur causa recte ineuntur. Tale foedus Solomonis cum Hiramo fuit 1 Reg. 5. 11 et 10. 22. Igitur quod simile foedus in Iosaphato reprehenditur, ex iis quae vi loco praemissa sunt interpretationem recipit. 2 Chr. 20. 37.

 

Limit[atio]. Nisi hoc forte eam rationem habet specialem,36 quia Rex Isr[ael] erat apostata.

 

Restringe: ita haec fieri debere ut interim Fidelibus non minora beneficia aut etiam maiora praestentur.

 

In praemiss[a]. Ad societatem bellicam quod attinet, ea duplex est: ἐπιμαχία et συμμαχία, hoc est, defensiva et offensiva. Utraque sive cum Infidelibus sive cum Fidelibus inita iniusta est, si in omne futurum bellum contrahitur,37 sine exceptione, nisi causa38 iniusta sit.39

 

Concl[usio] iii. In bello autem iusto Infideles40 recte a Fidelibus defendentur, etiamsi ii qui Infideles opprimunt Fideles haberi velint. Imo hoc opus non modo licitum, sed et summe laudabile et ex circumstantiis saepe necessarium est; ex 2 Prop[ositione]. Ps. 82. 4; Prov. 24. 1.

 

Limit[atio]. Excipe, nisi revelatum sit Deum aliquas41 gentes ob Infidelitatem velle punire. Inde illud: osores Iehovae diligere te. 2 Chr. 19. 2. Item: Non enim est Iehova cum Israelitis. 2 Chr. 25. 7.

 

Concl[usio] iv. Vicissim fideles bellum iustum gerentes auxilio Infidelium uti possunt.42 A quib[us]43 accipienda beneficia. Sen[eca] 2 [De] Ben[eficiis] 18.

  1. 1.Dum ne occasio ea ratione detur Infidelib[us] nocendi veritati.
  2. 2.Dum ne fiat ex diffidentia.

Aut contra praeceptum speciale: ut Iud[aei] in accersendis Aegyptiorum auxiliis.

 

Concl[usio] v. Summa publica societas est unio reipublicae. Quin44 autem populus fidelis cum infideli in una45 republica manere possit dubium non est.

Sc[aliger] in Anim[adversionibus] ad Eus[ebium] 148.

Exemplum: Iud[aei] cum Idum[aeis]; Israel[ites] cum Aegypt[iis].

 

Concl[usio] vi. An autem sponte in talem communionem venire debeat, plus habet difficultatis. Cumque hoc matrimonio non sit dissimile, et fini verae reipublicae non parum repugnet, idem docendum videtur, maxime extra casum necessitatis, et cum Infidelibus qui ab Ecclesia abierunt.

Societas inaequalis aut Fideles superiores aut inferiores facit; estque aut privata aut publica. 1 Reg. 5. 6.

 

Prop[ositio] vi. Fidelibus licet habere ministros atque etiam servos infideles. Th[omas] 2. 2. 10. 9.

 

Fol. 317v:

Concl[usio]. vii. Pariter Magistratui aut Populo Fideli licet populum Infidelem in ditionem suam accipere.

 

Prop[ositio] vii. Licet Fideli operam suam locare Infideli. Esdras. Nehemias. Iosephus. Daniel. Vide46 Philipp. 4. 22.

 

Prop[ositio] viii. Fidelis si sit servus Infidelis domini47 talis manere debet. 1 ad Tim. 6. 1. Potest tamen fidelis Magistratus lege lata Dominium Infidelium in homines fideles in ditionib[us] suis impedire, quae lex iustam habet rationem. C. ne Christ. manc. L. unica.

 

Prop[ositio] ix. Sponte autem dare se in servitutem ne Fideli quidem extra casum necessitatis facile licet. Infideli multo minus. Tamen in casu necessitatis non videtur prohibitum.

 

Concl[usio] viii. Pariter populo fideli48 incumbit obsequi Principi aut Magistratui Infideli. Lex tamen fieri potest in Rep[ublica] ut Princeps factus49 Infidel[is] principatu excidat.

 

Concl[usio] ix. At tali se subiicere, vix licet. 1 Cor. 6. 1 et 6. Deut. 17. 15: e Fratri[bus] tuis.

 

Ampl[ificatio].50 Distingue: ut minus liceat Apostatae se subiicere quam tantum Infideli.

 

Lim[itatio]. Deinde, ut in protectionem se dare Infideli salva religione et libertate aliqua non videatur prohibitum. Ita Iacobus se Regis Aegyptii fidei permisit. Rex Solomon civitates aliquas Hiramo tributarias fecit.

 

Lim[itatio]. Praeterea ut liceat etiam sine exceptione se Infideli subiicere ubi est speciale Dei imperium: ut Iudaei Assyrio iussi sunt se mancipare. Ierem. 27. 8.

 

Lim[itatio]. Idem probabiliter dici posset in ultimo casu necessitatis, arg[umentum] Ierem. 27. 13.

David Israelitis pepercit.51

 

Transcription of the reading notes and source-references

Fol. 316 (1) rv, 316 (2) rv are inserted between fol. 315v and fol. 317r

 

Fol. 316 (1) r.

Left column

Sol[omon] cum Phar[aonis] filia.

 

Ante legem.

 

Foedus Abrahami viri pii cum Rege profano Abimeleco de non offendendo et colenda amicitia idque haereditarium. C[ap.] 21 Gen. 27.

 

Simile foedus Isaaci: ubi illud de non offendendo clarius exprimitur. Gen. 26. 29.

 

Iacob cum Labane socero pagano foedus init: de matrimonio integre servando, item52 et non offendendo. Gen. 31. 49 et seq[uentes].

 

Foedus cum civitatib[us] se dedentib[us] permittitur.

Ita:53 Extra vi populos, 20. 17, Deut. *54

 

Bellum aeternum cum Hamalecitis 17. 16, Exo. et Deut. 25. 17.

 

Contra in Ammonitas bellare vetantur Isr[aelites]. Deut. 2. 19.

 

Foedus cum Gabaonitis de non occidendo contra legem tamen servatur. Ios. 9. 15; 2 Sam. 21. 2.

 

Ita:55 nisi se dedunt in tempora Innum[eralia].56 Ios. 9. 18, aliter57 Deut. 20. 10. Ios. et de Rahab et 1 Reg. 9. 20.

 

Congregatio xi trib[uum] contra Beniam[in]. Iud. 20[. 30].

 

Foedus privatim Davidis et Ion[athae] amicitiae. 1 Sam. 18. 2 et 23. 18.

Rex David foedus paciscitur cum seniorib[us] Isr[ael]. 2 Sam. 5. 3; 1 Chr. 11. 3.

 

  1. 1 Sam.David ad Abimelecum profugit. 1 Sam. 21.

    Deinde ad Moabitos. [1 Sam.] 22. 3.

    Ad regem Gathi, [1 Sam.] 27, offert se Philist[iim] q[uam] Isr[ael] auxiliatorem. [1 Sam.] 29.

 

Sal[omon]58 affinitatem iungit cum Rege Aegyptio. 1 R[eg.] 3. 1.

 

Legati inter Davidem et Hiramum. 2 Sam. 5. 11.

Inter Sol[omon] et Hir[amum]. 1 Reg. 5. 1;

commercium, v. 11;

pax et foedus, [v.] 12. Sapienter et pie.

 

Sal[omon] xx civitates Hiramo donat. 1 R[eg.] 9. 12

Societas mercatoria inter Reges. 10. 1 R[eg.] 22.

Abneri foedus cum Davide de regno eius procurando. 2 Sam. 3. 12

 

Asa Rex Iudae59 contra Bahascham Regem Isr[ael] foedus cum Syro init. [1 Reg.] 15. 19.

Ante foedus pacis60 (2 Chr. 16. 3) cum utroque erat61 Syro.

Israel. Idolatria. 2 Chr. 13. 8.

 

Prophetae denuntiatio ad Asam: quando Syro Regi et non Deo innixus, et copiae Syrorum ab auxilio tuo se proripiunt etc. de diffidentia. 2 Chr. 16. v. 7.

Sicut infra: quod in medicis fideret. [2 Chr.] 16. v. 12.

 

Achab cum Syro devicto foedus init sibi honorificum. 1 R[eg.] 20. 34.

Reprehenditur quod anathemate devotum servasset, v. 42.

 

Fol. 316 (1) r.

Right column

2 Chr. 16.

 

Achab impius pium Iosaphatum ad foedus pertrahit belli contra Syrum gerendi. 1 R[eg.] 22. 4. Praedicitur infelix eventum.

 

Pax inita inter hos duos, 1 R[eg.] 22. 45; et filios.

 

Et mox idem Iosaph[atus] cum62 Ioramio63 ad bellum Moabiticum foederatur. 2 R[eg.] 3. 5.

 

Propheta eum reprehendit ob foedus cum Achabo:

An improbo auxiliari et osores Iehovae diligere te [oportuit]? At propter haec tibi incumbit fervens ira a Iehova. 2 Ch. 19. 2.

 

Mox cum Achazia Rege Isr[ael] foedus init et societatem mercatoriam: quae ob socii improbitatem male ipsi cedit, causa diserte expressa. 2 Ch. 20. 37.

 

Ioiada sacerdos cum primorib[us] populi foedus init ad regnum regi legitimo tradendum.

2 R[eg.] 11. 4; 2 Chr. 23. 1.

 

*

Isr[aelitae] vetantur foedus pacisci cum populis terrae promissae; aut affinitatem iungere. Ex. 34. 12 [et] 15; ne mutatione ad Idolatriam prolaberentur. Deut. 7. 3 et 4. Iud. 2. 2.

 

Consortia impiorum fugienda. 1 Cor. 15. 33. Prov. 1. 15; 13. 20; 22. 24; 24. 1.

 

Fructus societatis. Utilis communio. Ecc. 4. 9.

 

Societas ad malum finem. Act. 23. 12. V[ide] Loc[os] Comm[unes] in verbo Coniuratio.

 

Recedite a tabern[aculis] impiorum in seditione Corachi. Num. 16. 26.

 

* paena addita Num. 33. 55.

 

Amasia Rex Iud[ae] prius64 mercede conduxit Isr[aelitas]. Propheta ait: Ne venito tecum exercitus Israel[itarum]. Non enim est Iehova cum Israelitis. Sed procede tu, age, confirma te ad hoc bellum, etc. Dicente vero Rege quid ergo faciam c[entum] tal[entis]? Respondit: Est Iehovae dare tibi amplius eo. Separavit65 itaque eos Amasia: quare accensa est ira Isr[aelitarum] contra eum. Sequitur victoria.

 

No[ta]: Paulus auxilium a Romanis magistratib[us] sumit. Caesarem appellat. Indecorum fidelib[us] esse dicit inter se coram infidelib[us] disceptare.

 

Uxor a viro infideli divertere non debet. 1 Cor. 7. 12.

Contra Esrae c[ap.] 10.

 

De Excommunicatis; et quatenus eorum consortio abstinendum.

 

Quatenus media alias non licita ex necessitate fiunt licita.

 

Fol. 316 (1)v.66

 

Fol. 316 (2)r.

Eleemosyna an propinquioribus facienda an peccatori[bus].

Quo ordine Th[omas] 2. 2. 32. 9.

Utrum magis diligendi meliores an coniunctiores 2. 2. 26. 7.

 

Fol. 316 (2)v.

Left column

De societate pro defensione singulorum infid[elium] contra infid[eles]. Vict[oria] 368.

 

De societate cum infideli iuste bellante contra inf[idelem] iniuste bellantem. 370.

 

An liceat societatem inire cum Heterodoxis.

Dem. 206. Col. 2 et 3.

 

Christiani habentes iustum bellum ad sui defensionem uti possunt infidelib[us] pacificis non ha[ben]tibus guerram activam aut passivam nobiscum; imminente necessitate, aliter non. Silv[ester] Bellum. 1. n. 9, concl[usio] 3. All[egat]67 Nic[olaum] de Lir[a] et alios.

 

Mac[cabaeorum] foedus cum Romanis. 1 Mac. 8. 18. Defensivum.68

Rex Francisc[us].

Rex Antonius.

 

Ius Canonicum.

 

Pan[ormitanus] in c[anonem] quod super de voto: licitum esse Christ[ianis] uti auxilio Infid[elium].

All[egat]69 Oldr[adi] cons[ilia] 67.

Et all[egat] hist[oriam] Maccab[aeorum]. Item quia insidiis uti li[citum] a maiori.70 Item quia fideles dominum infidelem licite iuvant, c[anon] Iulianus, et c[anon] si dominus, 11. Q[uaestio] 3.

 

Iudaei Samaritanis debent officia proximi. Luc. 10. 29.

Infidelitas non tollit Ius Naturale, aut humanum. Tho[mas].

 

Dist[inctio:] infideles ab initio. Apostolus: haereticos ab initio, sine vel cum71 Idol[olatria];

et relapsos in haeresim. Excommunicatos, singulos, Universos.

 

Societas ad def[ensionem] fidelis; vel ad defensionem infidelis; vel ad off[ensionem].

Item contra fid[eles] aut contra infid[eles].

 

Damn[um] christianitatis aut religionis apparens: ex72 def[ensione] aut off[ensione].

 

Exempla Rom[anorum] de sociis defendendis. Cic[ero]. Aug[ustinus] 3 de Civit[ate] Dei. Tho[mas].

 

Abraham pro Lotho arma suscipit ipse non offensus. Gen. 14.

 

De defendendis oppressis v[ide] al[iter]73 c[aput] 6 de Manubiis. V[ide] 23, q[uaestio] 3 per totum, praecipue c[anon] Non inferenda.

 

Iudaei vetantur contra Nabuc[hodonosor] ab Aegyptio Rege auxilium petere. Es. 31. 1. et 36. 6.

Sen. Ep. 95.

 

Iacob in Regis Aegyptii patrocinium se74 contulit.

 

Ioseph, Daniel, alii in aedes barbarorum.

Esdras. Nehemias. Esther.

Esther nupta Regi profano.

 

2 Cor. 6. 14. Nolite iugum ducere cum Infidelibus. Et seq[uentes].

 

Cum infidelib[us] caenare. Ita75 1 Cor. 10.

Exempla Christi.

 

Charitatis officia in o[mn]es, praecipue domesticos fidei. Gal. 6. 10.

Alienigenae a[utem] foenerabis.

 

Commercia cum Infidelib[us]. Abr[aham] et Iacob agros76 emunt.

Paulus tentoria vendit. Alienigenae a[utem] foenerabis.

Salomon cum Hiramo.

Contractus tenere cum infid[elibus]; leges de deditione.

 

Amicitia violetur vetari.

 

Haeretici vitandi. Tit. 3. 10.

 

Foedus inaequale: dedere se infidelib[us].

Ita77 Exemplum in Iudaeis: melius servire quam interire.

 

Fol. 316 (2)v.

Right column

Ps. 82. 4: Eripite pauperem et egenum de manu peccatoris liberate.

Erue eos qui ducuntur ad mortem. Prov. 24. 11.

 

Caiet[anus] 2. 2, q[uaestio] 40, art[iculus] 1; ibi in eodem art[iculo]: pro ultione sociorum iusta causa belli.

Item externis ministris ad bellum uti licet.

 

No[ta]: arg[umentum] a relatis.

Ut de usura.

 

συμμαχία

ἐπιμαχία

Tropheia. Foedera. Livius.

In Fabrum et Iab.78

De alienis subditis defendendis. V[ide] Gent[ilim].

De rebellib[us] et proditoribus.

 

2 Cor. 7. 16:

διὸ ἐξέλθατε ἐκ μέσου αὐτῶν

καὶ ἀφορίσθητε, λέγει κύριος,

καὶ ἀκαθάρτου μὴ ἅπτεσθε:

κἀγὼ εἰσδέξομαι ὑμᾶς.

 

Manassis affinitas cum Sanballete reprehenditur.

Neh. c[aput] 13. [28–29]; v[ide] Io[sephum].

 

οὐ γὰρ συγχρῶνται Ἰουδαῖοι Σαμαρίταις. Ioh. 4. 9.

Christus a Sam[aritana muliere] aquam sumit.

 

Christus apud Pharis[aeos] caenat. Luc. 7. 36 et 39.

Math. 18. 17. Esto tibi ut Ethnicus et Publicanus; i[ta:] Curam tuis ne habeto: ne te scandalizent.

 

Inimici iuvandi tempore necessitatis. Prov. 25. 21.

 

Fol. 318v

De publica societate cum infidelibus79

 

V[ide] Tract[atum] de leg[ibus] Mosaicis, p. 304.

Iunius80 in Irenico distinguit inter inimicos Ecclesiae et amicos extra Ecclesiam.

His benefaciendum et ab his beneficia accipiend[um].

Ait:81 qui non est quam nobis nobiscum.

Benedicentib[us] tibi benedicit de Abrahamo.

Qui aquam in nomine Proph[etae] ministraverint.

Math. 10.

Editum Irenicum Iunii a[nn]o 93 circa82 mutatione[m], ut puto, Henrici iv.

Translation

 

Hugo Grotius, On Public Partnership with Non-Believers

(Leiden, University Library, ms. Cod. bpl 922)

 

xviii n 922 i e

Fol. 314–318: Autograph theses of Hugo Grotius On public partnership with non-believers; with added notes pertaining to the matter, 6 folio sheets.

 

Fol. 314r

On public partnership with non-believers.

 

It is an old question, and also in our days frequently discussed, if and to what degree it be allowed to Christians to enter into a partnership with non-believers, or even heretics. The question appears to be treated on the basis of multiple examples, rather than reasons, and moreover not with sufficient distinctions. Therefore we think it necessary to try whether some light may be shed on it by a new discussion. Before we come to the argument, let us declare these things in advance.

 

1. Since the community of mankind is of two types, one stemming from creation, the other from recreation, that is, the natural and the ecclesiastical, and for the preservation of the former one a law is instituted that we call [the law] of nature (either primary or secondary), it should be known that an error of faith changes nothing of those things that pertain to natural law and the protection of that universal community, an argument used by Thomas 2[a], 2[ae], quest[io] 10, art[iculus] 10.1

 

2. One must therefore carefully guard against all things that appear to go against divine glory and the true religion, so that neither hope, nor fear will advise the contrary. Let this admonition however remain: first of all, seek the kingdom of heaven.2

 

3. Also in those affairs that are permitted to our liberty in general, one should first and foremost take into account what is decent or offending.

 

4. But even in these affairs, however, if extreme urgency compels us, many things are done justly that otherwise would not be devoid of error.

 

5. This general exception must be made, that things that are called just or unjust, sometimes cease to be thus due to a special calling.

 

6. And that many actions that are not illicit in themselves are condemned as the result of the inner state of mind of the one who performs them. 2 Sam. 33;3 2 Kings 20 at the end.

 

7. Distinction between non-believers 1: some belonged to the Church, others did not.

 

8. On two types of alliance: ἐπιμ[αχία] [defensive], συμ[μαχία] [offensive].4 Private alliance – public; equal – unequal; superior – inferior.

 

9. An alliance for purposes of war can be just.

 

10. Universal [alliance] should not be just without exception.

 

Fol. 314v:

After these premisses, let the first proposition be:

 

i. Proposition. To refrain from harming non-believers and heretics in general is not only permissible for Christians, but also necessary; from the first premise. For the law of nature prescribes that evil should be inflicted on no one, and Christ emphasizes this a thousand times. Hence follows the conclusion:

 

i. Conclusion. It is permissible for both private and public persons to enter into a pact with non-believers or heretics not to harm one another.

For whatever is rightly done, we stipulate and promise that the same will be right in the future. Such was the pact of Abraham, and afterwards of Isaac, pious men, with the heathen king Abimelech; and that was hereditary. Gen. 21 v. 27 and 26 v. 29. Likewise of Jacob with his father-in-law Laban. Gen. 31 v. 49.5 Such also of David and Hiram, king of Tyre: 2 Sam. 5. 11.6 And likewise of Solomon and Hiram, which Scripture clearly approves.7 1 Kings. [5 v. 26]; 2 Sam. 5 v. 12.

 

Make an exception for those believers, who are bound by the prescription of a calling to punish non-believers. And so God forbids to conclude a peace treaty with the Amalekites (Deut. 17. 16)8 and with the six cursed peoples (Deut. 25. 17),9 because God had chosen his people to punish them. And therefore, that this prohibition comes from a special, not from a general reason, also appears from the fact that, on the contrary, God himself wished that the peace treaty with the Ammonites and precisely the non-believers was to be kept by the faithful people. Deut. 2. 19.10

 

Let the second proposition be:

 

ii. Proposition. Good deeds, duties, trades, for the sake of charity, civility, and utility,11 can be rightly cultivated reciprocally between the faithful and the non-believers or heretics. For these things also proceed from nature, and are therefore common to all men, as in the first premise.

 

Amplification. Add to this that it is not only allowed to do good to non-believers or heretics, but according to the circumstances, consider it even necessary, when we can help them without great disadvantage to ourselves, especially when they ask our help themselves.

 

The ancient Jews did not agree with these assertions: who, as John the Evangelist says ([John] 4. 9), do not usually have dealings (συγχρῆσθαι), which means have any kind of social intercourse with the Samaritans, as the heterodox (ἑτεροδόξοι); and therefore Christ shows them in the parable that the appellation of neighbor also applies to them. Luke 10. 36; Act. 10. 28.12 Juvenal’s Satire also notes this error of the Jews:

Forbidding to point out the way to any not worshipping the same rites, and conducting none but the circumcised to the desired fountain.13

 

Fol. 315r:

Now by this example of showing the way, as Cicero applies the verse of Ennius ([On] dut[ies] 1. [51]),14 all those things must be understood which can be offered (as help) without harm to others: and the very law of nature dictates that these should be provided, even to an unknown person. And you will find almost the same things in Seneca, where he asks whether good should be done both to the wicked and the ungrateful; and following Aristotle,15 he says that some things are not given to men, but to humanity. On Benefits 4. 29.16 Which also Herod Atticus expresses in [Aulus] Gellius.17 Seneca discusses the same thing in On Benefits 4. 28. And Christ teaches with the most certain argument that our good deeds should be extended even to the most alien people, since God himself, the Best and the Greatest, makes his sun rise for and his rain fall upon the good and the bad alike, as he wanted all the good things of nature to be understood through the sun and the rain.18 But even he himself did not disdain to receive a drink of water from a Samaritan woman, even though it was a small benefit.19 But Paul also obtained protection from the non-believing Romans.20 These [examples] pertain to good deeds. For the duties of civility, this is valid: If some of the non-believers invite you, and you want to go, eat whatever is set before you. 1 Cor. 10. 27.21 Objection: Deut. 5 and the added reason.22 This, too, is against the institutions of the Jews, who blamed Christ because he attended banquets with men who were strangers to the Church.23 It also holds for trade. Abraham and Jacob bought lands from the non-believers.24 And countless other examples are at hand: although even in this respect some of the Jews seem not to have judged correctly, from which it is believed that the error was born of the disciples, who interpreted Christ’s warning about being careful of leaven as if they were forbidden to purchase bread from people of Pharisaic superstition.25

 

The idea of this proposition should be restricted by these additions.

 

i. Limitation. 1 [old number]. Greater charity must be shown towards the faithful than towards the unfaithful. Paul to Gal. 6. 10.26 Let us be charitable to all, but especially to those who are of the household of faith.27

 

ii. Limitation. Unless it appears that damage to the faith would result from this; from the second premise. To which perhaps also pertains this rule of the old law: You shall lend to a stranger at usury; but not to your brother.28 You shall demand [usury] from a foreigner, Deut. 15. 3.29 Now the reason is clear, because in these things, the fellowship of nature is supplemented by the community of grace. Reason dictates that the closer the connection, the greater the benefits should be. Now see what follows.

 

i. Limitation. iii. Proposition. 2 [old number]. Likewise greater friendship and familiarity should be cultivated with the faithful than with the non-believers. For the greatest bond of friendship is the harmony of strivings, especially concerning the greatest matters.30 Hence that brotherly love (φιλαδελφία) is so often recommended in the Gospel.31 Aristotle.32

 

Fol. 315v:

First premise to the proposition.

To the proposition. It should also be noted here that there are two kinds of non-believers or ἑτεροδόξοι; those who never belonged to the Church; and those who departed from it, or are expelled by an ecclesiastical judgement. This distinction is approved in 1 Cor. 5 v. 12.33

 

ii. Limitation. iii. Proposition. Christians must abstain from intimate relations and social intercourse with those who have fallen from the Church, or have been condemned by its judgement: because this is so arranged for a special reason, that they should return to shame and repentance. Hence the Apostle to Tit. 3. 10 commands to avoid a heretical man after one admonition and another. However, this precept of abstinence is not so restricted as to exclude the case of necessity, or even all utility, since it is without doubt permissible for the faithful to sometimes approach these heretics with the hope of conversion.

 

But it is at least expedient for those who are aware of their weakness to abstain from the intercourse with other non-believers.

 

iii. Limitation from the third premise. It is recommended not to enter into a very close familiarity with non-believers and heretics without reason, but those who converse with non-believers of another kind should take care on all occasions, so that they try to bring them to good sense by both doctrine and example. 1 Thess. 4. 12.

 

Now let us see what kinds of partnership there can be between believers and non-believers, both privately and publicly, for in both cases the principle is almost the same. And let us first consider an equal partnership; of which there are different degrees.

Let us point out that the first degree [comprises of] living together and familiarity on an equal footing.

 

iii. Proposition. It is permissible to have some friendship and familiarity with non-believers and with heretics. From [above].

 

iv. Proposition. The highest union is in marriage. Now it is a matter of either a concluded marriage or a marriage to be concluded. In case of a concluded marriage it is not permissible to separate from the non-believer. 1 Cor. 7. 12.34

 

Limitation. However, I think that it should be understood in such a way that it is permissible for a faithful magistrate to make a law by which the marriage of a faithful person with an unbeliever is declared null and void, so that it does not bind. For it is in the power of the magistrate to invalidate contracts for just reasons. Because such a law existed among the Jews, Ezra rightly commanded the Jews at the time of independence (αὐτονομία) to depart from the common dwelling with the non-believers. [Ezra] c[hapter] 10.35

 

v. Proposition. If it is a question of contracting in general, it is impossible not to condemn marriages with non-believers: because the main purpose of marriage, the education of children to the glory of God, is in such a union not a little hindered. So that it has its place here: do not yoke, ἑτεροζυγεῖν, with the non-believers. 2 Cor. 6. 13 [= 14].36 Scaliger, Animadversiones in Eusebium, 149.37 Solomon is reproached for this reason, and Manassis, the brother of the high priest, is said to have defiled the priesthood with such a marriage. Neh. 13 v. 26 and 28.38

 

Limitation. Make an exception for those who are especially called to this, which may perhaps be said of Esther. Whether the same pertains in a case of necessity, for example, if a person, not endowed with the gift of self-restraint, finds himself in such a place where he cannot otherwise have a wife, needs consideration; except that it is by no means impious to believe that God will provide that his faithful should not be constrained to such straits. Here is her submission.39 On kinship. Deut. 7.

 

Fol. 317r:

These same things occur in public alliances.

 

Conclusion ii. For treaties with the non-believers are rightly entered into for the sake of friendship, commerce, travels, and other benefits which are mutually guaranteed. Such was Solomon’s treaty with Hiram, 1 Kings 5. 11 and 10. 22.40 Therefore, the fact that a similar treaty is criticized in Jehoshaphat receives an interpretation from what is stated in the sixth premise. 2 Chr. 20. 37.41

 

Limitation. Unless perhaps this has a special reason, because the king of Israel was an apostate.

 

Make a restriction: these things must be done in such a way that in the meantime the faithful are not given less but even greater benefits.

 

Regarding the premises. As regards a military alliance, it is of two types: ἐπιμαχία and συμμαχία,42 that is, defensive and offensive. [An alliance] entered into either with the non-believers or with the faithful, is unjust if war is agreed to for every future, without exception, unless the cause is just.

 

Conclusion iii. But in a just war the non-believers will be rightly defended by the faithful, even if those who oppress the non-believers wish to be considered as faithful. Nay, this work is not only permitted, but also highly praiseworthy, and because of the circumstances often necessary; from the second proposition. Ps. 82. 4; Prov. 24. 1.43

 

Limitation. Make an exception, unless it has been revealed that God wants to punish some nations for infidelity. Hence the saying: should you love those who hated Jehovah. 2 Chr. 19. 2. Again: For Jehovah is not with the Israelites. 2 Chr. 25. 7.44

 

Conclusion iv. On the other hand, the faithful who are waging a just war can use the help of the non-believers. From whom benefits are to be received. Seneca in 2 On Benefits 18.

  1. 1.As long as no occasion is thereby offered to the non-believers for harming the truth.
  2. 2.As long as it is not done out of distrust.

Or against a special command: as the Jews in calling for the Egyptian auxiliaries.45

 

Conclusion v. The highest public partnership is the union of the state. But there is no doubt that a faithful people can remain in one state with non-believers.

Scaliger in Animadversionibus ad Eusebium 148.46

Example: Jews with Idumeans; Israelites with Egyptians.

 

Conclusion vi. But whether a people should voluntarily enter into such a communion is more difficult. And since this is not unlike marriage, and not a little inconsistent with the end of a true state, it seems that the same thing should be taught, especially outside cases of necessity, and with non-believers who have departed from the Church.

An unequal partnership either makes the faithful superior or inferior; and it is either private or public. 1 Kings 5. 6.47

 

Proposition vi. It is permissible for the faithful to have non-believers as servants and even as slaves. Thomas 2. 2. 10. 9.

 

Fol. 317v:

Conclusion. vii. It is equally permissible for a faithful magistrate or people to accept an infidel people under its authority.

 

Proposition vii. It is permissible for the faithful to lend his services to the faithless. Ezra, Nehemiah, Joseph, Daniel.48 See Philip. 4. 22.

 

Proposition viii. If a faithful [slave] is a slave of an unfaithful master, he must remain so. 1 to Tim. 6. 1. It is possible, however, for a faithful magistrate, by law, to prevent the ownership of non-believers over faithful men under his jurisdiction, which law has a just reason. C. ne Christ. manc. L. unica.49

 

Proposition ix. But it is not easily allowed to submit oneself voluntarily in servitude to a believer, except in cases of necessity. Much less so to a non-believer. However, in case of necessity, it does not seem to be prohibited.

 

Conclusion viii. Likewise, it is incumbent upon a faithful people to obey an infidel prince or magistrate. However, a law can be made in the state so that a prince who has become unfaithful may be deposed from his leadership.

 

Conclusion ix. But it is hardly permissible to submit oneself to such a prince. 1 Cor. 6. 1 and 6. Deut. 17. 15: from your brothers.50

 

Amplification. Note the distinction: that it is less permissible to submit oneself to an apostate than just to a non-believer.

 

Limitation. Then, it does not seem to be forbidden to place oneself under the protection of an infidel, in order to save religion and some freedom. Thus Jacob committed himself to the good faith of the king of Egypt.51 King Solomon made certain cities tributary to Hiram.52

 

Limitation. Moreover, that it is permissible even without exception to submit oneself to a non-believer where there is a special command of God: as the Jews were ordered to subject themselves to Assyria. Jeremiah 27. 8.

 

Limitation. The same could probably be said in the utmost case of necessity, the argument of Jeremiah 27. 13.

 

David spared the Israelites.53

 

Translation of the reading notes and source-references

 

Fol. 316 (1) r.

Left column

Solomon with Pharaoh’s daughter.

 

Before the Law.54

Picture 3
Picture 3

Reading notes in De societate publica cum infidelibus, written in the hand of Grotius. Leiden University Library, ms bpl 922 Ie, fol. 316 (1)r.

Citation: Grotiana 45, 1 (2024) ; 10.1163/18760759-20240001

Picture 4
Picture 4

Reading notes in De societate publica cum infidelibus, written in the hand of Grotius. Leiden University Library, ms bpl 922 Ie, fol. 316 (2)v.

Citation: Grotiana 45, 1 (2024) ; 10.1163/18760759-20240001

 

The pact of Abraham, the pious man, with the heathen king Abimelech, of non-offensiveness and of cultivating friendship, and that was hereditary. C[hapter] 21 Gen. 27.55

 

A similar pact of Isaac: where the pact of non-offensiveness is more clearly expressed. Gen. 26. 29.

 

Jacob enters into a pact with his heathen father-in-law Laban: of keeping the marriage intact and of non-offensiveness. Gen. 31. 49 and following.56

 

A pact with surrendering peoples is allowed.

That is: except for the six peoples, 20. 17, Deut. *

 

Eternal war with the Amalekites 17. 16. Ex. and Deut. 25. 17.57

 

On the other hand, the Israelites are forbidden to make war on the Ammonites. Deut. 2. 19.58

 

The pact with the Gibeonites about not killing is still kept against the law. Jos. 9. 15; 2 Sam. 21. 2.

 

That is: unless they give themselves up forever. Jos. 9. 18. otherwise Deut. 20. 10. Jos. and about Rahab59 and 1 Kings 9. 20.

 

The gathering of the eleven tribes against Benjamin. Jud. 20[. 30].60

 

A pact of friendship concluded privately between David and Jonathan. 1 Sam. 18. 2 and 23. 18.

King David makes a treaty with the elders of Israel. 2 Sam. 5. 3; 1 Chr. 11. 3.

 

  1. 1 Sam.David fled to Abimelech. 1 Sam. 21.

    Then to the Moabites. [1 Sam.] 22. 3.

    To the king of Gath, [1 Sam.] 27, he offers himself as an auxiliary from Israel to the Philistines. [1 Sam.] 29.

 

Solomon makes an alliance by marriage with the king of Egypt. 1 Kings 3. 1.

 

Ambassadors between David and Hiram. 2 Sam. 5. 11.

Between Solomon and Hiram 1 Kings 5. 1;

trade, verse 11.

peace and pact, [verse] 12. Wisely and piously.61

 

Salomon gives twenty cities to Hiram. 1 Kings 9. 12.

A partnership for trade between the kings. 10. 1 Kings 22.62

A pact with David made by Abner concerning the procuration of the latter’s kingdom. 2 Sam. 3. 12.

 

Asa king of Judah enters into a treaty with Syria against Bahasha, king of Israel. [1 Kings] 15. 19.

Before, Syria had a peace treaty (2 Chr. 16. 3) with both kings.

Israel. Idolatry. 2 Chr. 13. 8.

 

The announcement of the prophet to Asa: because you relied on the Syrian king and not on God, the forces of the Syrians also have rushed away from your help, etc. on distrust. 2 Chr. 16. v. 7.63

As below: that he trusted the doctors. [2 Chr.] 16. v. 12.64

 

Ahab enters into an honorable treaty with conquered Syria. 1 Kings 20. 34.

He is blamed for having spared someone struck with a curse, v. 42.65

 

Fol. 316 (1) r.

Right column

2 Chr. 16.

 

The impious Ahab draws the pious Jehoshaphat into a treaty to wage war against Syria. 1 Kings 22. 4. An unfortunate ending is foretold.

 

Peace was made between these two, 1 Kings 22. 45; and [their] sons.

 

And soon the same Jehoshaphat is bound in an alliance with Jehoram for the Moabite war. 2 Kings 3. 5.

 

The prophet reproached him for his pact with Ahab:

Did you have to help a depraved man and love those who hated Jehovah? But because of these things the burning anger of Jehovah lies upon you. 2 Chr. 19. 2.66

 

Soon he entered into a treaty and a commercial partnership with Ahaziah, king of Israel: which due to dishonesty of his partner turned out badly for him, for a reason eloquently expressed. 2 Chr. 20. 37.

 

Joiada the priest enters into a covenant with the foremost of the people to hand over the kingdom to the rightful king. 2 Kings 11. 4; 2 Chr. 23. 1.

 

*

The Israelites are forbidden to negotiate a treaty with the peoples of the promised land; or to enter into an alliance of marriage. Ex. 34. 12 [and] 15; so that they do not fall into idolatry by the exchange. Deut. 7. 3 and 4. Judges 2. 2.

 

The company of the unfaithful must be avoided. 1 Cor. 15. 33. Prov. 1. 15; 13. 20; 22. 24; 24. 1.67

 

The fruits of society. A useful companionship. Ecc. 4. 9.

 

Partnership for a bad aim. Act. 23. 12. See Commonplaces on the word ‘conspiracy’.68

 

Depart from the camp of the impious in the rebellion of Korah. Num. 16. 26.69

 

* penalty added Num. 33. 55.

 

King Amaziah of Judah first hired the Israelites for a fee. The Prophet said: Do not let the army of Israel come with you. For Jehovah is not with the Israelites. But go on, act, strengthen yourself for this war, etc.70 While the king rightly says, what then shall I do with one hundred talents? He answered: Jehovah is able to give you more than this.71 Amaziah therefore discharged them: wherefore the anger of the Israelites was kindled against him.72 Victory follows.

 

Note: Paul receives help from the Roman authorities. He appeals to the emperor.73 He says that it is unworthy of the faithful to argue among themselves in the presence of the unfaithful.74

 

A wife should not divorce from an unfaithful husband. 1 Cor. 7. 12.75

Against Ezra c[hapter] 10.76

 

On the excommunicated; and to what extent their company is to be abstained from.

 

To what extent otherwise impermissible means become permissible by necessity.

 

Fol. 316 (1)v.

 

Fol. 316 (2)r.

Whether alms should be given to those to whom we are more closely related or to sinners.

In which order Thomas 2. 2. 32. 9.77

Whether the better or the more closely related are to be preferred 2. 2. 26. 7.78

 

Fol. 316 (2)v.

Left column

On the alliance for the defense of some of the non-believers against the non-believers. Vitoria 368.79

 

On the alliance with a non-believer who is waging a just war against a non-believer who is waging an unjust war. 370.80

 

Whether it is permissible to enter into a partnership with the heterodox.

Dem. 206.81 Col. 2 and 3.82

 

Christians having a just war for their own defense can use peaceful infidels who have no active or passive war with us; when necessity is pressing, not otherwise. Sylvester on the word ‘war’. 1. no. 9, conclusion 3.83 He refers to Nicholas of Lyra and others.84

 

A treaty of the Maccabees with the Romans. 1 Mac. 8. 18. Defensive.

King Francis.

King Antoine.85

 

Canon law.

 

Panormitanus on the canon ‘Quod super de voto’ [What above on the vow]: that it is lawful for Christians to use the assistance of infidels.86

He refers to Oldradus’s Consilia [Advices], 67.87

 

He also refers to the history of the Maccabees. Also because it is permitted to use ambushes, reasoned from the more extended case. Also because the faithful may lawfully help an unfaithful master, canon Julian, and canon Si dominus [If the owner], 11. Question 3.88

 

The Jews owe the Samaritans the duties of a neighbor. Luke 10. 29.89

Unbelief does not take away the natural or human law. Thomas.90

 

Distinction: unbelievers from the beginning. Apostle: heretics from the beginning, without or with idolatry; and those who have relapsed into heresy. Those who are excommunicated, individually, or in general.

 

Partnership for defense of the faithful; or for defense of the unbeliever; or for offense. Likewise, either against the faithful or against the unfaithful.

 

Evident harm to Christianity or religion: from defense or offense.

 

Examples of the Romans defending their allies. Cicero. Augustinus 3 The City of God. Thomas.91

 

Abraham takes up arms for Lot without being attacked himself. Gen. 14.

 

On the defense of the oppressed see otherwise c. 6 of De Manubiis.92 See 23, question 3 throughout, especially canon Non inferenda [Not inflicting].93

 

The Jews are forbidden to ask the assistance of the Egyptian king against Nebuchadnezzar. Isaiah 31. 1 and 36. 6.94

 

Seneca, Epistles, 95.95

 

Jacob committed himself to the patronage of the king of Egypt.

 

Joseph, Daniel, and others into the houses of barbarians.

Ezra. Nehemiah. Esther.

[right column:] Esther married to a heathen king.

 

2 Cor. 6. 14. Avoid being yoked together with infidels. And the following.96

 

Eating with unbelievers. Thus 1 Cor. 10.97

Examples of Christ.

 

Duties of charity towards all, especially to those who are of the household of faith. Gal. 6. 10.98

You will, however, lend to a foreigner.99

 

Trade with infidels. Abraham and Jacob buy fields.100

Paul sells tents.101 You will, however, lend to a foreigner.

Solomon with Hiram.102

To keep contracts with the unfaithful; the laws of surrender.

 

To forbid that friendship is violated.

 

Heretics must be avoided. Titus 3. 10.

 

An unequal pact: to surrender oneself to the unfaithful.

Thus the example of the Jews: it is better to serve than to perish.103

 

Fol. 316 (2)v.

Right column

Ps. 82. 4:104 Deliver the poor and liberate the needy from the hand of the sinner.

Hold back those who are being led to death. Prov. 24. 11.105

 

Caietanus 2. 2. question 40, article 1; there in the same article: revenge of one’s allies is a just cause of war.

Likewise, it is permissible to use foreign assistants for war.106

 

Note: Argument from related issues.

As on usury.

 

Defensive alliance

Offensive alliance.107

Trophies. Covenants. Livius.

In Fabrum and Jab.

On defending foreign subjects. See Gentili.108

On rebels and traitors.109

 

2 Cor. 7. 16:110

come out from among them

and be absolved, says the master,

and do not touch impurity:

and I will welcome you.

 

Manasseh’s kinship with Sanballat is criticized.

Neh. c[hapter] 13. [28–29]; see Josephus.111

 

For Jews do not mix with Samaritans. John 4. 9:

Christ takes water from a Samaritan woman.112

 

Christ dines with the Pharisaeans. Luke 7. 36 and 39.

Math. 18. 17. Let him be to you as a pagan and a tax-collector;113 so: Pay no heed to your limbs: lest they offend you.114

 

Enemies should be helped in time of need. Prov. 25. 21.

 

Fol. 318v

On public partnership with unbelievers.

 

See the Treatise on the Mosaic Laws, p. 304.115

Junius distinguishes in Eirenicum between the enemies of the Church and friends outside the Church.

The latter should be treated well and from them benefits may be accepted.

He said: there is no one with us but he who is for us.116

He blesses those who blessed you, on Abraham.117

Those who shall have administered water in the name of the Prophet.

Math. 10.118

The Eirenicum of Junius published in the year [15]93, I think around the change of Henry iv.119

1

The authors are grateful to the two anonymous reviewers for their valuable comments. We also thank the Leiden University Library for kindly granting permission to publish a transcription and translation of Grotius’s De societate publica cum infidelibus. Henk Nellen prepared the transcription of the Latin text, Diederik Burgersdijk translated it into English, and Marc de Wilde wrote the introduction. As the authors constantly discussed their work with each other, it should be seen as the product of collaborative research. The introduction builds on arguments that were first presented in Marc de Wilde, ‘Hugo de Groots De societate publica cum infidelibus: Pleidooi voor tolerantie of rechtvaardiging van kolonialisme’, in De achterkant van Minerva: Opstellen aangeboden aan prof. Kees Cappon ter gelegenheid van zijn afscheid van de Universiteit van Amsterdam, ed. by Gustaaf van Nifterik, Joke de Vries and Marc de Wilde (Amsterdam: 2019), pp. 115–28, translated as ‘Hugo Grotius’s De Societate publica cum infidelibus: Justifying Overseas Expansionism or Religious Toleration’, Tijdschrift voor rechtsgeschiedenis, 88 (2020), 422–39.

2

Leiden University Library, ms. Cod. bpl 922 I e, fol. 314–318. The manuscript is available online at: https://digitalcollections.universiteitleiden.nl/view/item/936830#page/51/mode/1up. bpl 922 I contains five manuscripts of Grotius: (a) Commentarius in theses xi (fol. 276–286), (b) Theses sive quaestiones lvi (fol. 287–292), (c) Commentarius de bello ob libertatem eligendo (fol. 293–307), (d) Observationes iuridicae contra pacem cum archiduce Alberto ineundam, non autographae (fol. 308–313), and (e) De societate publica cum infidelibus (fol. 314–318).

3

Catalogue de manuscrits autographes de Hugo Grotius dont la vente a eu lieu à la Haye le 15 novembre 1864 sous la direction et au domicile de Martinus Nijhoff, ed. by W.J.M. van Eysinga and L.J. Noordhoff (The Hague: Martinus Nijhoff, 1952), p. 27 (lot. 78).

4

Peter Borschberg, ‘De societate publica cum infidelibus: Ein Frühwerk von Hugo Grotius’, Zeitschrift der Savigny-Stiftung für Rechtsgeschichte: Romanistische Abteilung, 115 (1998), 355–93.

5

Letter of Hugo Grotius to Georg Lingelsheim, 1 November 1606, in Hugo Grotius, Briefwisseling van Hugo Grotius, ed. by P.C. Molhuysen (The Hague: Martinus Nijhoff, 1928), vol. 1, p. 72 (no. 86). Henceforth referred to as bw.

6

Borschberg, ‘De societate’, p. 356.

7

We have used the following editions: Hugo Grotius, De iure praedae commentarius, ed. by H.G. Hamaker (The Hague: Martinus Nijhoff, 1868), trans. as Hugo Grotius, Commentary on the Law of Prize and Booty, ed. by Martine van Ittersum, trans. by Gwladys L. Williams (Indianapolis: Liberty Fund, 2006), henceforth referred to as ipc; Hugo Grotius, Remonstrantie of 1615: Facsimile, Transliteration, Modern Translations and Analysis, ed. by David Kromhout and Adri K. Offenberg, trans. by Cis van Heerum (Leiden: Brill, 2019), henceforth referred to as Remonstrantie; and Hugo Grotius, De iure belli ac pacis libri tres, ed. by B.J.A de Kanter – Van Hettinga Tromp, annot. by F. Feenstra, C.E. Persenaire, and E. Arps – de Wilde (Aalen: Scientia Verlag, 1993), trans. as Hugo Grotius, De jure belli ac pacis libri tres, ed. by James Brown Scott, trans. by Francis W. Kelsey (Oxford: Clarendon Press, 1925), vol. 2: translation (trans. based on the Blaeu edition of 1646), henceforth referred to as ibp.

8

Orazio Condorelli, ‘Grotius’s Doctrine of Alliances with Infidels and the Idea of Respublica Christiana’, Grotiana, 41 (2020), 13–39 (p. 24).

9

See, inter alia, Peter Borschberg, ‘Hugo Grotius and the East Indies’, in The Cambridge Companion to Hugo Grotius, ed. by Randall Lesaffer and Janne Nijman (Cambridge: Cambridge University Press, 2021), pp. 65–90; Peter Borschberg, Hugo Grotius, the Portuguese and Free Trade in the East Indies (Singapore: nus Press, 2011); Martine van Ittersum, ‘The Long Goodbye: Hugo Grotius’ Justification of Dutch Expansion Overseas’, History of European Ideas, 36 (4) (2010), 386–411; Martine van Ittersum, Profit and Principle: Hugo Grotius, Natural Rights Theories and the Rise of Dutch Power in the East Indies (1595–1615) (Leiden: Brill, 2006); Edward Keene, Beyond the Anarchical Society: Grotius, Colonialism and Order in World Politics (Cambridge: Cambridge University Press, 2002); Eric Wilson, Savage Republic: De Indis of Hugo Grotius, Republicanism and Dutch Hegemony within the Early-Modern World System (c. 1600–1619) (Leiden: Brill, 2008); Henk Nellen, ‘Hugo Grotius over kaapvaart en commerciële expansie’, Leidschrift, 26 (2011), 59–73.

10

Richard Tuck, ‘Alliances with Infidels in the European Imperial Expansion’, in Empire and Modern Political Thought, ed. by Sankar Muthu (Cambridge: Cambridge University Press, 2012), pp. 61–83 (p. 75).

11

Ibid., p. 75 and Van Ittersum, Profit and Principle, pp. 49–50.

12

As early as 1868, the Dutch historian Robert Fruin demonstrated that Grotius had been commissioned by the voc to write a treatise to defend the seizure of the Santa Catarina. Fruin believed that Grotius wrote De iure praedae primarily to convince Mennonite shareholders of the voc of the legitimacy of its legal claims to the Portuguese vessel. An English translation of Fruin’s seminal article was published in 1925 under the title ‘An Unpublished Work of Hugo Grotius’, Bibliotheca Visseriana, 5 (1925), 3–71. For a critical discussion of Fruin’s thesis and the circumstances which led Grotius to write De iure praedae, see Van Ittersum, Profit and Principle, pp. 105–88.

13

ipc, ed. Hamaker, pp. 202–3, ed. Van Ittersum, pp. 296–7.

14

ipc, ed. Hamaker, p. 297, ed. Van Ittersum, p. 432.

15

Tuck, ‘Alliances with Infidels’, pp. 74–6; Van Ittersum, Profit and Principle, p. 54.

16

This view was summarized in the early sixteenth century by Sylvestro Mazzolini da Prierio, also known by his Latin name as Sylvester Prierias, Sylvestrinae Summae … pars prima (Antverpiae: Ex officina Christophori Plantini, 1569), p. 93 (left column), on ‘Bellum I’ (‘De bello publico’), 8, 3: ‘Christiani habentes iustum bellum ad sui defensionem uti possunt (…) infidelibus pacificis non habentibus guerram activè aut passivè nobiscum imminente necessitate: aliter non’ (‘Christians having a just war for their own defense can use peaceful infidels who have no active or passive war with us; when necessity is pressing, not otherwise’). For other examples, see Tuck, ‘Alliances with Infidels’, pp. 64–6.

17

ipc, ed. Hamaker, p. 299, ed. Van Ittersum, p. 436.

18

For instance, in both De iure praedae and De societate, Grotius referred to the biblical examples of Abraham, Isaac, David and Solomon, who had entered into treaties of friendship and military alliances with ‘infidel’ rulers. Van Ittersum, Profit and Principle, p. 50.

19

On the voc’s alliance with the king of Johor see ipc, ed. Hamaker, pp. 297-9, ed. Van Ittersum, pp. 432–6.

20

For instance, in De iure belli ac pacis, Grotius also refrained from discussing the East Indies explicitly, yet scholars have convincingly demonstrated that, for instance, his theories about unequal treaties and monopoly contracts implicitly justified the voc’s policies. See Inge van Hulle, ‘Grotius, Informal Empire and the Conclusion of Unequal Treaties’, Grotiana, 37 (2016), 43–60 and Van Ittersum, ‘The Long Goodbye’, 391–3.

21

For this thesis, see also De Wilde, ‘Hugo Grotius’s De societate’, pp. 1–18 (pp. 3–4).

23

In Latin, the words manubiae and praeda are closely related: praeda refers to the booty taken in war and manubiae to the money obtained from the sale of booty. As we explained above, the title De iure praedae was added to Grotius’s manuscript by its nineteenth-century editor. Chapter 6 of De iure praedae deals with ‘efficient causes of war’. One of these efficient causes is the protection of the oppressed from injustice. At the beginning of the chapter, Grotius quotes Democritus in Latin: ‘Injuria oppressos defendere pro viribus oportet et non negligere; illud enim justum bonumque est, hoc vero injustum et malum’ (ed. Hamaker, p. 60, ed. Van Ittersum, p. 93: ‘It behoves us to defend with all our might the victims of unjust oppression, and not to leave them neglected; for the former course is just and good, whereas the latter is unjust and wicked’). This quotation resembles the description Grotius gives in De societate: ‘De defendendis oppressis v[ide] al[iter] c[aput] 6 de Manubiis’ (‘On the defense of the oppressed see otherwise c. 6 de Manubiis’). In De iure praedae, Grotius uses the words manubiae or manubiis several times (see, e.g., ipc, ed. Hamaker, p. 54, 146 and 315). We thank Prof. em. Jan Hallebeek for helping us identify this source.

24

Martine van Ittersum, The Working Papers of Hugo Grotius: Transmission, Dispersal and Loss, 1604–1864 (Leiden, Brill, forthcoming), pp. 76–77 and 79. We thank Dr. Van Ittersum for generously sharing her 2024 monograph.

25

The developments that led to Grotius’s arrest, trial and imprisonment at Loevestein Castle are described in Henk Nellen, Geen vredestichter is zonder tegensprekers: Hugo de Groot: Geleerde, staatsman, verguisd verzoener (Amsterdam: Athenaeum, Polak & Van Gennep, 2021), pp. 91–101 and 109–31.

26

On the confiscation of Grotius’s books and manuscripts: G. Moll, ‘De confiscatie der goederen van Hugo de Groot’, Oud Holland, 20 (2) (1902), 83–112, (pp. 83–102 and 107–112); P.C. Molhuysen, ‘De bibliotheek van Hugo de Groot in 1618’, Medeelingen der Nederlandsche Akademie der Wetenschappen, nieuwe reeks, deel 6, afdeeling letterkunde, 1–4 (1943), 45–9; Martine van Ittersum, ‘Confiscated Books and Manuscripts: What Happened to the Personal Library and Archive of Hugo Grotius Following his Arrest on Charges of High Treason in August 1618?’, in Lost Books: Reconstructing the Print World of Pre-Industrial Europe, ed. by Flavia Bruni and Andrew Pettegree (Leiden: Brill, 2016), pp. 362–85; Van Ittersum, Working Papers, pp. 127–160.

27

In 1625, the Court of Holland and Zeeland decided that half of the confiscated assets which Maria jointly owned with her husband had to be restored to her, and in 1630, the Court annulled the confiscation of all of Grotius’s possessions. Van Ittersum, Working Papers, p. 157; Moll, ‘De confiscatie der goederen van Hugo de Groot’, pp. 98–9; Molhuysen, ‘De bibliotheek van Hugo de Groot in 1618’, p. 45.

28

Van Ittersum, Working Papers, p. 79.

29

Ibid., pp. 133–134.

30

After Grotius’s escape, Maria received permission to leave Loevestein together with her maid and ‘her belongings’. It is unclear whether she managed to take Grotius’s books and manuscripts with her. Ibid., p. 143.

31

Letters from Grotius to Nicolaes van Reigersberch, 14 April and 10 June 1622, in bw, 2, p. 204 (no. 744) and p. 225 (no. 766).

32

Letter from Grotius to Willem de Groot, 20 June 1622, in bw, 2, p. 225 (no. 767): ‘Gratias ago pro transmisso Stobaei libro, item pro illis puerilibus quibus valde opus habebamus’.

33

According to the editor of Grotius’s correspondence P.C. Molhuysen, the puerilia of the letter of 20 June 1622 referred to the Annales et historiae and Defensio capitis, which Grotius had specifically requested in his letters of 14 April and 10 June 1622 to his brother-in-law Nicolaes van Reigersberch. However, according to Haggenmacher, it is unlikely that Grotius, in his letter of 20 June, referred to his Annales et historiae and Defensio capitis, as it was addressed to his brother Willem, and not to his brother-in-law Nicolaes. Instead, Haggenmacher concludes that ‘it is plausible that the puerilia of the letter to Willem refer in the first place to De iure praedae’. Peter Haggenmacher, Grotius et la doctrine de la guerre juste (Paris: Presses Universitaires de France, 1989), p. 386, n. 1871.

34

As Van Ittersum observes, it would have made sense for Willem de Groot to include the manuscript of De iure praedae in the shipment of Grotius’s puerilia, if it was indeed in his possession. As we have seen, in his letters to Nicolaes van Reigersberch, Grotius had specifically requested his Defensio capitis, which was a reply to William Welwood’s critique of Mare liberum. As chapter 12 of De iure praedae constituted the original text of Mare liberum, it would have been logical for Willem to assume that his brother also wished to receive De iure praedae. Van Ittersum, Working Papers, p. 158, n. 29.

35

Ibid., p. 157.

36

Ibid., pp. 565–72 (app. 1).

37

Ibid., p. 369. These voc papers are now preserved at the Dutch National Archives at the Hague, Collectie Hugo de Groot, supplement I, access 1.10.35.02, inv. 40.

38

Van Ittersum, Working Papers, p. 369. These manuscripts are now at the Leiden University Library, ms bpl 917 (De iure praedae) and ms bpl 922 I, fol. 276–286 (Theses xi), fol. 287–292 (Theses lvi), fol. 302–307 (De Pace) and fol. 314–318 (De societate publica cum infidelibus).

39

Grotius, Observationes iuridicae contra pacem cum archiduce Alberto ineundam, non autographae, Leiden University Library, ms bpl 922 Id, fol. 308–313. The manuscript contains some minor corrections in Grotius’s hand. A transcription of the text has been published in W.J.M. van Eysinga, ‘Eene onuitgegeven nota van De Groot’, in Sparsa collecta: Een aantal der verspreide geschriften van Jonkheer Mr. W.J.M. van Eysinga, ed. by F.M. van Asbeck, E.N. van Kleffens, K.P. van der Mandele en J.R. Stellinga (Leiden: Sijthoff, 1958), pp. 488–504 (pp. 496–504); L.J. Noordhoff, Beschrijving van het zich in Nederland bevindende en nog onbeschreven gedeelte der papieren afkomstig van Huig de Groot welke in 1864 zijn geveild (Groningen: Noordhoff, 1953), p. 60.

40

Hugo Grotius, Ius Atticum et formulae et sententiae, Leiden University Library, ms bpl 922 ii, fol. 319–344. Cf. Noordhoff, Beschrijving, p. 60.

41

Apart from the Remonstrantie itself (fol. 1–34), it contained an undated resolution of the states of Holland and West-Friesland concerning the legal order imposed on the Jews (fol. 198–200), copies of the decrees issued by Charles V against the ‘new Christians’ of 1549 and 1550 (fol. 205–211), and an anonymous response to the draft regulations on behalf of the Portuguese Jewish Community of Amsterdam (fol. 202–204). Today, these documents are preserved at the Ets Haim Library of the Portuguese synagogue in Amsterdam (ms eh 48 A 02 and ms eh 48 A 05) with the exception of the anonymous response, which is part of the Bibliotheca Rosenthaliana at the Amsterdam University Library (ms ros 350/ 1).

42

Van Ittersum, Working Papers, p. 417.

43

Ibid., p. 462.

44

Ibid., p. 486.

45

Ibid., p. 474.

46

Grotius, De societate publica cum infidelibus, Leiden University Library, ms Cod. bpl 922 Ie, fol. 314–318. https://digitalcollections.universiteitleiden.nl/view/item/936830#page/51/mode/1up.

47

Borschberg, ‘De societate’, p. 357; Hugo Grotius, Theses lvi, Leiden University Library, Ms Cod. bpl 922 Ib, fol. 287–290.

48

Gen. 21.27; 26.29 and 31.49; 2 Sam. 5.11–12.

49

Grotius, De societate, fol. 316 (1)r, left column.

50

An example is the manuscript entitled Observationes iuridicae contra pacem cum archiduce Alberto ineundam, non autographae, pertaining to the peace negotiations with Spain, which was placed directly before De societate in volume 24 (Leiden University Library, ms bpl 922 Id, fol. 308–313). Another example is Grotius’s Remonstrantie of 1615, which was written by a clerk with marginal additions in Grotius’s hand (Ets Haim, ms eh 48 A 02). Grotius’s letters to East Indian rulers have been preserved both as drafts and as scribal copies with revisions made by Grotius himself. See, e.g., Dutch National Archives, Collectie Hugo de Groot, supplement I, access 1.10.35.02, inv. 40, fol. 344–345 (draft letter to the king of Ternate) and fol. 361–362 (copy of the letter to the king of Ternate, with marginal notes in Grotius’s hand).

51

An example can be found on fol. 315r, where Grotius writes ‘his additamentis’, adding the alternative formulation above the line: ‘hoc additamento’.

52

Borschberg, ‘De societate’, p. 356.

53

Martine van Ittersum, ‘Dating the Manuscript of De jure praedae (1604–1608): What Watermarks, Foliation, and Quire Divisions Can Tell Us About Hugo Grotius’s Development as a Natural Rights and Natural Law Theorist’, History of European Ideas, 35 (2009), 125–93.

54

Noordhoff, Beschrijving, p. 60.

55

Peter Borschberg, ‘De Pace: Ein unveröffentlichtes Fragment von Hugo Grotius über Krieg und Frieden’, Zeitschrift der Savigny-Stiftung für Rechtsgeschichte: Romanistische Abteilung, 113 (1) (1996), 268–292 (p. 292).

56

Peter Borschberg, Hugo Grotius’ Commentarius in Theses xi: An Early Treatise on Sovereignty, the Just War, and the Legitimacy of the Dutch Revolt (Bern: Peter Lang, 1994), p. 197.

57

Peter Borschberg, ‘Grotius, the Social Contract, and Political Resistance: A Study of the Unpublished Theses lvi’, International Law and Justice Working Papers, 7 (2006), 1–87.

58

Marc de Wilde, ‘Offering Hospitality to Strangers: Hugo Grotius’s Draft Regulations for the Jews’, Tijdschrift voor rechstgeschiedenis, 85 (2017), 391–433 (p. 404); Nellen, Geen vredestichter, pp. 101–6.

59

Wilhelmus Zepperus, Legum mosaicarum forensium explanatio (Herbornae Nassoviorum: Ex officina Christophori Corvini, 1604), iv.6 (‘De federibus cum impiis et idololatris’), pp. 304–7.

60

See Josephus Justus Scaliger, Thesaurus temporum (Lugduni Batavorum: Excudebat Thomas Basson, 1606), with a separately paginated Animadversiones in Chronologica Eusebii. Grotius possessed a copy of Scaliger’s book, which was confiscated after his arrest in 1618. See Molhuysen, ‘De bibliotheek van Hugo de Groot in 1618’, p. 51 (nr. 25).

61

Grotius, De societate, fol. 315v, prop. 5.

62

Ibid., fol. 317r, concl. 5.

63

Comparable grape watermarks have been found on documents from the period 1600–1650 in the Zeeland Archives. Th. and F. Laurentius, Watermarks 1600–1650 Found in the Zeeland Archives (‘t Goy-Houten: Hes and De Graaf Publishers, 2007), pp. 34–6 and 238–42 (no. 553–74).

64

Hugo Grotius, Letter to the King of Ternate, Dutch National Archives, The Hague, Collectie Hugo de Groot, supplement I, access 1.10.35.02, inv. 40, fol. 344–345.

65

W.E. Smelt, ‘Beschrijving eener verzameling papieren, afkomstig van Hugo de Groot’, in Inventarissen van Rijks- en andere archieven (The Hague: Algemeene Landsdrukkerij, 1928), pp. 81–82 (at fol. 344–345) and Marc de Wilde, ‘Allying with Unbelievers: Hugo Grotius’s Letters to East-Indian Rulers’, Journal of the History of International Law, 25 (1) (2023), 1–35 (p. 9).

66

Leiden University Library, ms bpl 922, fol. 302–307. The watermark of the grape with a diamond shape cluster can be found on fol. 302, 305 and 306. Borschberg, ‘De Pace’, p. 270.

67

For instance, in De societate, Grotius only used this paper for the reading notes on fol. 316 (2). By contrast, the main text was written on slightly larger and thicker paper, containing the watermarks of a crown and a crest (on fol. 314 and 317).

68

We thank Martine van Ittersum for her help in identifying the watermarks on De societate and for sharing her views on how they can be used to date Grotius’s manuscripts. See also Van Ittersum, ‘Dating the manuscript of De iure praedae’, with a reference to the manuscripts in bpl 922 on p. 143.

69

These letters can be found at the Dutch National Archives, Collectie Hugo de Groot, supplement I, access 1.10.35.02, inv. 40, fol. 344–345 (draft letter to the king of Ternate), 359–360 (draft letter to the lords of Banda, with an instruction in Grotius’s hand to send the same letter to the queen of Patani and the king of Bantam), 361–362 (copy of the letter to the king of Ternate, with marginal notes in Grotius’s hand), 364 (draft letter to the lords of Ambon), 364v (draft letter to the king of Siam), 365–366 (copy of the letter to the king of Tidore, with marginal notes in Grotius’s hand), 424 (draft letter to the king of Johor), 424–425 (draft letter to the emperor of Malabar), 430 (draft letter to the emperor of Borneo), and 430v (draft letter to the king of Tidore). An English translation of Grotius’s letter to the king of Tidore has been published in Grotius, Commentary on the Law of Prize and Booty, ed. by Martine van Ittersum (Indianapolis: Liberty Fund, 2006), pp. 553–5 (app. 9). Borschberg has published transcriptions and English translations of the letters to the kings of Siam and Johor: Peter Borschberg, ‘Cornelis Matelief, Hugo Grotius, and the King of Siam (1605–1616): Agency, Initiative and Diplomacy’, Modern Asian Studies, 54 (1) (2020), 123–56 (pp. 153–6, app. 2 and 3 (transcriptions) and 139–40 (translations)). The other letters are discussed in De Wilde, ‘Allying with Unbelievers: Hugo Grotius’s Letters to East-Indian Rulers’.

70

F.W. Stapel, ‘Corpus diplomaticum Neerlando-Indicum: Verzameling van politieke contracten en verdere verdragen door de Nederlanders in het Oosten gesloten, van privilegebrieven aan hen verleend, etc’. Bijdragen tot de taal-, land- en volkenkunde van Nederlands Indië, 57 (1907), 30–48 (xiiixx).

71

Dutch National Archives, The Hague, Collectie Hugo de Groot, supplement I, access 1.10.35.02, inv. 40, fol. 344r (Ternate), 359r (Banda) and 365r (Tidore).

72

Ibid., fol. 344v and 362r (Ternate), 359v (Banda), 366r and 430v (Tidore). See De Wilde, ‘Allying with Unbelievers’.

73

On Grotius’s involvement in the peace negotiations of 1607 and 1608: Van Ittersum, Profit and Principle, pp. 189–282 and Borschberg, ‘Hugo Grotius and the East Indies’, p. 70.

74

Hugo Grotius, ‘Vertoog opgemaakt voor de Oost Indië Compagnie betreffende de houding, door deze bij de onderhandelingen met Spanje aan te nemen’ (undated), Dutch National Archives, The Hague, Collectie Hugo de Groot, supplement I, access 1.10.35.02, inv. 40, fol. 295–299 (first version) and 405–413 (second version), at fol. 406r. On Grotius’s memorandum: Van Ittersum, Profit and Principle, pp. 191–2 and 227–44; Borschberg, ‘Hugo Grotius and the East Indies’, pp. 71–2.

75

Grotius, ‘Vertoog’, fol. 405v.

76

Ibid., fol. 405v.

77

Van Ittersum, Profit and Principle, p. 192.

78

Ibid., p. 265; Grotius, ‘Vertoog’, fol. 406r.

79

Van Ittersum, Profit and Principle, p. 265 and Borschberg, ‘Hugo Grotius and the East Indies’, pp. 71–2.

80

Grotius, De societate, fol. 314v.

81

ipc, ed. Hamaker, p. 297, ed. Van Ittersum, pp. 432–3.

82

Borschberg, Hugo Grotius, the Portuguese and Free Trade, p. 56.

83

See, e.g., Tuck, ‘Alliances with Infidels’, p. 75 and Condorelli, ‘Grotius’s Doctrine of Alliances with Infidels’, p. 30; Van Ittersum, Profit and Principle, p. 49.

84

For a textbook discussion of societas in Roman private law: Barry Nicholas, An Introduction to Roman Law (Oxford: Clarendon, 1977), pp. 185–7. On the historical development of societas: Max Kaser, Das römische Privatrecht (Munich: Beck, 1975), vol. 2, pp. 409–15.

85

Wolfgang Kunkel, Roman Legal and Constitutional History, trans. by J.M. Kelly (Oxford: Oxford University Press, 1966), p. 40.

86

Cicero, De re publica, trans. by Clinton Walker Keyes (Cambridge, MA; Harvard University Press), 1.25.39: ‘coetus multitudinis iuris consensu et utilitatis communione sociatus’. On Cicero’s definition of the state as societas, see Elizabeth Asmis, ‘The State as Partnership: Cicero’s Definition of Res Publica in his Work in the State’, History of Political Thought, 25 (2004), 569–99.

87

Aquinas, Liber contra impugnantes Dei cultum et religionem, pars 2, c. 2, corp. On Aquinas’s distinction between societas privata and societas publica: Nicholas Aroney, ‘Subsidiarity, Federalism, and the Best Constitution, Thomas Aquinas on City, Province and Empire’, Law and Philosophy, 26 (2) (2007), 161–228 (p. 186). Cf. De Wilde, ‘Hugo Grotius’s De societate’, pp. 424–5, n. 11.

88

Grotius, De societate, fol. 317r.

89

See, e.g., ibid., fol. 314v, concl. 1 (and exempla).

90

Grotius, De societate, fol. 314r, prem. 8 and fol. 315v, prop. 3, sub lim. 3.

91

Ibid., fol. 315r.

92

This has also been noted by other Grotius scholars. For instance, Benjamin Straumann has demonstrated that Grotius modelled the titles for public war after legal remedies from Roman private law. Benjamin Straumann, ‘Is Modern Liberty Ancient? Roman Remedies and Natural Rights in Hugo Grotius’s Early Works on Natural Law’, Law and History Review, 27 (1) (2009), 55–86. See also Benjamin Straumann, Roman Law in the State of Nature: The Classical Foundations of Hugo Grotius’s Natural Law (Cambridge: Cambridge University Press, 2019).

93

See also ipc, ed. Hamaker, pp. 298–9, ed. Van Ittersum, p. 434, where Grotius uses the term societas to refer to the alliance with the Sultan of Johor, which had been concluded by the voc on behalf of the Dutch Estates General. In this context, the term societas is translated by Gwladys Williams as ‘alliance’ (or ‘alliances’ in the plural).

94

See, inter alia, Laurens Winkel, ‘Les origines antiques de l’appetitus societatis de Grotius’, Tijdschrift voor rechtsgeschiedenis, 68 (2000), 393–403; Benjamin Straumann, ‘Oikeiosis and appetitus societatis: Hugo Grotius’ Ciceronian Argument for Natural Law and Just War’, Grotiana, 24–25 (2003), 41–66 and Hans Blom, ‘Sociability and Hugo Grotius’, History of European Ideas, 41 (2015), 589–604.

95

ibp, prol. 6 (the reference to the Stoic οἰκείωσις was added in the edition of 1631).

96

ibp, prol. 6 (trans. Kelsey).

97

ibp, prol. 8.

98

See, inter alia, Grotius, De societate, fol. 314v, introd., 314v, prop. 1 and concl. 1, prop. 2 et ampl., 315v, prop. 3 and lim. 3.

99

Ibid., fol. 315v, in prop. 3.

100

Cf. Hugo Grotius, De veritate religionis christianae (Lugduni Batavorum: Ex officina Ioannis Maire, 1629 [1627]), iv (p. 134): ‘singula religionum genera, quae se Christianis opponent, Paganismus puta, Iudaismus & Mahumetismus’.

101

In the memorandum which Grotius prepared for the peace negotiations with Spain (which was placed directly before De societate in bpl 922), he referred to some of the same Catholic sources he used in De societate, including Panormitanus and Sylvester. The aim of Grotius’s memorandum was to determine on what legal grounds a peace treaty with Spain could potentially be declared null and void. Among the legal grounds that could be invoked to invalidate the treaty, Grotius mentioned the decree of the Council of Constance (1414–1418), according to which promises made to heretics were not binding, adding that ‘there is little doubt that the King of Spain regards us as heretics’ (fol. 309r). He also explained that, under canon law, public acts of those who were excommunicated were considered invalid. He even suggested that the pope could give away as booty the lands and possessions of heretics and the excommunicated to whomever he desired. As proof Grotius referred to Sylvester’s commentary on excommunicatio and Panormitanus’s gloss on c. quod super de voto – a source he also invoked in De societate (fol. 316 (2)v, left column). See Grotius, Observationes iuridicae contra pacem cum archiduce Alberto ineundam, non autographae, bpl 922 Id, fol. 308–313 (with references to Sylvester on fol. 309r and Panormitanus on fol. 308r and 309v); Van Eysinga, ‘Eene onuitgegeven nota van De Groot’, pp. 488–504 (pp. 498–9).

102

Grotius, De societate, fol. 317r, concl. 3. See De Wilde, ‘Hugo Grotius’s De societate’, pp. 429–30.

103

Grotius, De societate, fol. 314r, prem. 1. The reference is to S. Th. 2a 2ae, q. 10, a. 10. Borschberg, ‘De societate’, p. 360.

104

S. Th. 2a 2ae, q. 10, a. 5, resp. Borschberg, ‘De societate’, p. 360.

105

Cf. Borschberg, ‘De societate’, p. 360.

106

S. Th. 2a 2ae, q. 10, a. 6, resp.

107

S. Th. 2a 2ae, q. 10, a. 6, resp.: ‘infidelitas haereticorum, qui profitentur fidem Evangelii, et ei renituntur eam corrumpentes, gravius est peccatum quam Iudaeorum, qui fidem Evangelii numquam susceperunt. Sed quia susceperunt eius figuram in veteri lege, quam male interpretantes corrumpunt: ideo etiam eorum infidelitas est gravius peccatum quam infidelitas gentilium, qui nullo modo fidem Evangelii susceperunt’. English translation: The Summa Theologiae of St. Thomas Aquinas, trans. Fathers of the English Dominican Province (Lawrence Shapcote) (London: Burns, Oates and Washbourne, ca. 1916).

108

S. Th. 2 2ae, q. 10, a. 6, concl.: ‘infidelitas haereticorum est pessima’.

109

Grotius, De societate, fol. 315v, lim. to prop. 3.

110

Ibid., fol. 315v, in prop. 3.

111

Grotius, Remonstrantie, fol. 7r, p. 83, trans., p. 203.

112

Grotius, De societate, fol. 314r, introd.

113

See, e.g., S. Th. 2a 2ae, q. 10: ‘De infidelitate’; Sylvester Prierias, Sylvestrinae Summae, pp. 89–98: ‘De bello’.

114

Grotius, De societate, fol. 314v, prop. 1; cf. fol. 314r, prem. 1.

115

Ibid., fol. 314r, prem. 1.

116

Ibid., fol. 314v, concl. 1; cf. fol. 314r, prem. 1.

117

For instance, the second conclusion is placed behind the fifth proposition, to which it seems unrelated. Ibid., fol. 317r, concl. 2.

118

For instance, the seventh conclusion is placed before the seventh proposition. Ibid.,