The United Nations (UN) is an international organization established in 1945 after World War II to promote peace, security, human rights, and international cooperation among nations. The UN currently has 193 member states. Its main goals are to maintain global peace and security, support sustainable development, provide humanitarian assistance, protect human rights, and uphold international law. The UN operates through various bodies, such as the General Assembly, the Security Council, the International Court of Justice, and specialized agencies. It plays a key role in addressing global challenges such as conflict resolution, climate change, poverty reduction, and health crises.