Théodore Ruyssen, M. Keywords: Sociology | International law | States | International economic relations | Mots clefs: Sociologie | Droit international | Etats | Relations internationales économiques | ABSTRACT Theodore Ruyssen, in this course, intends to seek to what extent and under which formation of the human community constitutes a league in the strictest sense of the term. After a presentation of the sociological issue and the novelty of the idea of human community, the author focuses on the economic community, spiritual community, and finally the political community. Théodor…