The chapter covers significant global events and political developments of the 20th century, particularly focusing on the First and Second World Wars, the establishment of the United Nations, and the emergence of the Non-Aligned Movement. It also explores the dynamics of the Cold War, including the rivalry between the USA and USSR, culminating in the disintegration of the Soviet Union. The effects of these events on international relations and the shift towards a unipolar world dominated by the USA are discussed.