The United Nations was established in 1945 to replace the League of Nations with the goals of maintaining international peace and security, developing friendly relations among nations, and promoting social progress, better living standards, and human rights. The six main organs of the UN are the General Assembly, Security Council, Economic and Social Council, International Court of Justice, Secretariat, and Trusteeship Council. The UN aims to solve international problems, formulate policies on social and economic issues, and act as a forum for member nations.