The United Nations was established in the year 1945. Following the devastating effects of World War II, representatives from 51 countries gathered in San Francisco to draft the UN Charter. The organization's primary aim is to promote peace, security, and cooperation among nations to prevent future conflicts. The UN has since expanded to include 193 member states and addresses global challenges, including human rights, climate change, and humanitarian aid. It plays a vital role in fostering dialogue and collaboration among countries, reinforcing its mission to maintain international peace and promote sustainable development.