International Relations is the field of social science that examines the dynamics and practice of world politics in the past and the present in a theoretically informed way. In essence, it is a discipline of social sciences that thoroughly studies the phenomena of war and peace across space and time. It focuses on the relationships that develop between state and non-state actors in areas of human activity that transcend national borders, territories, and regions. From this angle, the course provides an overview of the history and evolution of the discipline of international relations, its great debates, and its major schools of thought, while also discussing relevant methodological issues and aspects of the philosophy of social science.