The United Nations (UN) is an international organization founded in 1945, aimed at promoting peace, security, and cooperation among countries. It was established after World War II to prevent future conflicts and to foster friendly relations among nations. The UN comprises 193 member states and works on various issues, including humanitarian aid, sustainable development, and human rights. Its key bodies include the General Assembly, the Security Council, and the International Court of Justice, which collectively address global challenges and strive to maintain international peace and security.