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Laudato si’ and the Promise of an Integrated Migration-Ecological Ethics
This book places Pope Francis’s landmark 2015 encyclical Laudato si’ at the center of an effort to integrate the ethics of migration and ecological devastation. These issues represent two of the great planetary challenges of our time. They are also deeply connected and likely to get worse in the coming decades. As addressed to these issues, the book advances two core arguments. First, Laudato si’ and its moral vision of integral ecology represent a culturally creative response to these challenges whose potential for application has not yet been fulfilled. Second, fulfilling the encyclical’s promise requires attention to divisions alongside connections. In particular, it requires attention to borders. As sites of power manifested, of families separated, of alienation and friendship, of hope and hopelessness, and of the limits of civil and political order, borders are both a challenge that must be engaged and an opportunity to apply Francis’s moral vision in concrete contexts.


We made behavioral observations in 37 social groups of the communal stripe-backed wren during 1990 and 1991 to investigate the recently-discovered shared paternity between dominant and subordinate males (or "SMs"). We found two distinct kinds of social groups that differed in terms of social behavior: "mother" groups, which contained only subordinate males that were sons of the dominant female (termed "DF-sons"), and "stepmother" groups, which contained at least one subordinate male unrelated to the dominant female (termed "DF-stepsons"). In mother groups only dominant males courted dominant females, mate-guarding was infrequent and aggression by dominant males toward other males was absent. On the other hand, stepmother groups were characterized by frequent association with and courtship of dominant females ("DFs") by both dominant males ("DMs") and DF-stepsons and relatively frequent aggression by dominant males toward DF-stepsons. DF-stepsons, moreover, sired 15% of all young in stepmother groups. Thus, incest avoidance dictated the behavior of subordinate males, and the mating system in wren groups was either monogamous or polyandrous, depending upon the relatedness between subordinate males and the dominant female.

In: Behaviour