The United Nations (UN), founded in 1945 after World War II, aims to facilitate international cooperation and achieve world peace, comprising five principal organs: the General Assembly, Security Council, Economic and Social Council, Secretariat, and International Court of Justice. It currently has 192 member states and specializes in various areas including peacekeeping, human rights, and international development through specialized agencies such as WHO, UNICEF, UNCTAD, and the World Bank. The UN's operations are funded by assessed and voluntary contributions from member states, with an estimated annual budget of $4.19 billion.