What are the top 5 political events of the 20th century?

The top five political events of the 20th century include World War I (1914-1918), which reshaped global alliances and led to significant political changes; the Great Depression (1929), which caused widespread economic turmoil and influenced governmental policies worldwide; World War II (1939-1945), which resulted in the establishment of the United Nations and the onset of the Cold War; the Cold War itself (1947-1991), characterized by ideological conflict between the U.S. and the Soviet Union; and the fall of the Berlin Wall (1989), symbolizing the end of communist control in Eastern Europe and the subsequent collapse of the Soviet Union. These events significantly shaped international relations and national politics throughout the century.