Which organization was formed after WWII to promote international peace and cooperation?

The United Nations was established in 1945, in the aftermath of World War II, with the primary purpose of promoting international peace, security, and cooperation among nations. The founding members recognized the devastating impacts of the war and sought to create a platform where countries could come together to discuss and resolve conflicts diplomatically, rather than through warfare.

The United Nations also aims to uphold human rights, foster social and economic development, and address global challenges such as poverty, disease, and environmental issues. Its establishment marked a significant shift towards multilateralism and collective action in international relations.

In contrast, other organizations such as the World Trade Organization, which focuses on international trade, and the North Atlantic Treaty Organization, which is primarily a military alliance, were created for different specific purposes and did not emerge from the same context as the United Nations. The Commonwealth of Nations, while promoting cooperation among member states, does not have the same broad mandate for global peace and security as the UN.