The goal of this course is to emphasize the relation of association and distinction between International Law and International Politics: questions regarding power legitimacy on global arena, and different positions held by the different schools and analysis’ models from the international relations Academic circles; to study the configuration of international relations prevalent in the twentieth and twenty-first century, as well as the end of pentarchy at the Concert of Europe, the unanimity of the League of Nations, collective security at the United Nations: bipolarity and multipolarity and the current phenomena of globalization and their impact on the legal system of States. Furthermore, it aims to explore the components of international relations; the actors, the context of action and the types of action (neutrality and indifference, opposition and cooperation, peace, war and neutrality). Therefore, the following didactic procedures will be used: lectures by the responsible Professor and seminars on subjects previously chosen, with the analysis of texts or historical or current situations through cooperation of a Monitor under strict supervision of the responsible Professor