After World War II, the international group formed to maintain world peace is the United Nations (UN). The UN was established in 1945 with the aim of preventing future conflicts and promoting cooperation among nations. It serves as a forum for member states to discuss and address global issues, maintain peace and security, promote human rights, and foster international cooperation in various fields such as social and economic development, health, and education. The UN consists of multiple specialized agencies, programs, and bodies, including the Security Council, General Assembly, and Secretariat, working towards maintaining peace and promoting sustainable development on a global scale.