World War II significantly reshaped international politics by leading to the emergence of the United States and the Soviet Union as superpowers, resulting in the Cold War. The war fostered the establishment of the United Nations to promote global cooperation and prevent future conflicts. Decolonization movements gained momentum as colonial powers weakened, leading to the independence of numerous nations in Asia and Africa. Additionally, the war catalyzed the formation of military alliances like NATO and the Warsaw Pact, fundamentally altering geopolitical dynamics. Overall, WWII redefined power structures and international relations for decades to come.