This seminar offers a historical and historiographical survey of modern international relations from the late 18th to the early 21st century. The course will examine some of the defining political events and international conflicts of the era -- such as the two world wars and the Cold War -- as well as the profound global transformations caused by decolonization. Aside from the role of state-to-state relations, we will explore the historical evolution of international and intergovernmental organisations (such as the LoN and the UN) and various efforts at economic and political integration. The course will also investigate the impact of ideas and ideologies on the shaping of the international system throughout the 'long twentieth century'. The seminar is compulsory for 1st year MA students in International History and Politics.