The primary purpose of the United Nations (UN) is to promote international cooperation and maintain peace and security among countries. Established in 1945, the UN aims to prevent conflicts, foster development, and uphold human rights. It serves as a platform for dialogue and negotiation among its member states, addressing a wide range of global issues such as poverty, climate change, and humanitarian crises. The UN also engages in peacekeeping missions and provides assistance through various agencies like UNICEF and WHO to help improve living conditions and ensure sustainable development worldwide.