M. Ruda, J. Keywords: Reservations | Treaties | Mots clefs: Réserves | Traités | ABSTRACT J. M. Ruda points out in the introduction to his course that the question of reservations to multilateral treaties has been one of the most controversial subjects of contemporary international law. The author aims in his course to show how the international law has to change for dealing with this issue, and aims to confirm that law is not and should never be an end in itself, but only a mode of regulating society or a com…