What major event in global politics did WWII give rise to?

World War II fundamentally reshaped global politics and led to the establishment of various international organizations aimed at promoting peace, security, and cooperation among nations. The United Nations (UN) was founded in 1945, following the conclusion of the war, to replace the ineffective League of Nations and to prevent future conflicts of such catastrophic scale.

The formation of the UN marked a significant shift from previous international bodies, as it was designed with broader membership and more substantial enforcement capabilities. It sought to address the failures of the League of Nations, which had been unable to prevent the aggression that led to World War II. The UN's primary goals included maintaining international peace and security, promoting human rights, and facilitating social and economic development.

The other choices represent significant but later developments in international relations. The League of Nations was established after World War I and failed to prevent WWII. The Warsaw Pact and NATO were formed during the Cold War, responding to the geopolitical tensions that emerged after WWII rather than being direct outcomes of the war itself. Thus, the establishment of the United Nations directly arose from the lessons learned during WWII and aimed at fostering a collaborative approach to global governance moving forward.