The International Institute of Sociology (IIS) is a scholarly forum for furthering professional interests through the exchange of ideas and open discussion without any ideological constraints. The main activity of the IIS is the organization of international meetings of limited scope, designed as intellectual exchanges focusing on plenary sessions as well as on working sessions proposed and organized by members at large. The Institute was established in 1893, and as such is the oldest continuous sociological association in existence.
The Annals of the International Institute of Sociology started in 1895, under the editorship of René Worms, Secretary General of the IIS. Volumes are supposed to come out once every year and they contain the proceedings of the previous congress. Publication is restricted to papers presented in the Plenary Sessions and in those Working Sessions which are either strictly connected with the congress theme or of particular interest to the social setting of the congress.
The Annals cover a multidisciplinary approach to social analysis, in concurrence with the nature of the membership of IIS that is not restricted to sociologists but also includes historians, economists, demographers, anthropologists, and social psychologists.