Klafkowski, Alfons Keywords: WaPeace | Treaties | Mots clefs: Guerres | Paix | Traités | ABSTRACT In the introduction to his course, Alfons Klafkowski raises the following questions: principle-based technique of organizing peace and international security is increasingly linked to international law, how does the question of the end of the state of war arises in international law, is the question regulated, and if so how and by whom? In order to answer these questions, the author presents the concept of state of…