What international organization was established after World War II to promote peace?

The United Nations was established after World War II in 1945 with the primary goal of promoting international cooperation and maintaining peace and security among nations. Its creation was a response to the devastation caused by the war, as global leaders recognized the need for a more effective mechanism to prevent future conflicts and address issues that transcend national boundaries, such as human rights and humanitarian assistance.

The organization comprises various specialized agencies and branches that work together to foster collaboration between member states in various fields, including health, education, and economic development. The UN also plays a crucial role in conflict resolution through peacekeeping missions and diplomatic negotiations.

The other organizations mentioned, while significant, were not founded with the same comprehensive global peace mandate. NATO, for instance, is a military alliance founded to provide collective defense against aggression, primarily in the context of the Cold War. The League of Nations, which preceded the United Nations, was established after World War I; however, it failed to prevent the outbreak of World War II, highlighting its limitations in effectively maintaining peace. The European Union, formed later, primarily focuses on economic and political integration among its member states in Europe.