Feinberg, Nathan Keywords: Permanent Court of International Justice | Mandate | Trusteeship | Minorities | Mots clefs: Cour permanente de Justice internationale | Mandats | Régime de tutelle | Minorités | ABSTRACT The system of mandates and the system of minorities have this common feature, notes Nathan Feinberg, that they both tend to ensure better living conditions as well as certain rights and liberties to non-state authorities, authorities who in default are of a special legal guarantee related to their existence, would fi…