Van Kan, J. Keywords: Peace | International law | History | Mots clefs: Paix | Droit international | Histoire | ABSTRACT In this course, J. van Kan does not propose to follow the development of the idea of international peace through the centuries, but to make a choice in the subject and to deal with some major detached but closely coherent chapters. The author writes that the organization of peace has proceeded through four paths: moral conviction, universalism, the supranational idea, and the international idea. T…