The international organization founded after World War II to promote peace and security is the United Nations (UN). Established in 1945, the UN aims to foster international cooperation and address global challenges such as conflict resolution, humanitarian aid, and sustainable development. The organization comprises various agencies and programs focusing on diverse issues, including education, health, and environmental sustainability. The UN plays a key role in facilitating dialogue among nations and maintaining international law and order, striving to prevent future wars and promote human rights.