The UN is an international organization founded in 1945 to replace the League of Nations and promote peace between nations. It aims to stop wars, provide a platform for dialogue, and carry out missions through subsidiary organizations. The UN headquarters is in New York and has six official languages. Member states fund the UN through contributions based on their national income. The UN is divided into bodies like the General Assembly, Security Council, and others that work on maintaining peace, developing relations, and solving global issues.