The United Nations Security Council is one of the six main organs of the United Nations, charged with maintaining international peace and security. It was established after World War II to address failures of the League of Nations. The Security Council consists of 15 members, including 5 permanent members (China, France, Russia, the UK, and US) and 10 temporary members. Its main responsibilities include maintaining peace and security, developing friendly relations between countries, and cooperating to solve international problems.