Condorelli, Luigi Keywords: International Law Commission | State responsibility | Mots clefs: Commission du droit international | Responsabilité des Etats | ABSTRACT Luigi Condorelli, Professor at the University of Geneva, begins his course by asking and solving a number of preliminary problems of general nature in order to clarify some important premises, which constitute a kind of conceptual tool for further research. The author then reconstructs, using the work of the International Law Commission, the principles o…