United Nations Charter Ratified
The United Nations Charter was ratified by the required number of nations
October 24, 1945
Building Peace After World War II
The United Nations was officially founded on October 24, 1945, when its charter was ratified by the five permanent members of the Security Council — the United States, the Soviet Union, the United Kingdom, France, and China — along with a majority of other signatories. The world had just emerged from the most destructive war in human history, with an estimated 70 to 85 million dead. The UN's founders were determined to create an institution that could prevent such a catastrophe from happening again. The organization replaced the failed League of Nations, which had been unable to stop the rise of fascism in the 1930s.
Structure and Purpose
The UN was designed with several main bodies. The General Assembly provides a forum where all member nations, large and small, have an equal voice. The Security Council has primary responsibility for maintaining international peace and security, with five permanent members holding veto power over its decisions. The Secretariat carries out day-to-day work under the leadership of the Secretary-General. Specialized agencies including the World Health Organization, UNICEF, and the World Food Programme address specific global challenges. The organization began with 51 members and today includes 193.
Successes and Limitations
The UN has achieved significant successes, including coordinating decolonization, developing international humanitarian law, and managing peacekeeping operations in dozens of conflict zones. Its agencies have vaccinated millions of children and fed millions of people facing famine. But the Security Council's veto system has repeatedly paralyzed the organization on the most dangerous conflicts, when one of the permanent members is a party to the dispute. The Atlantic Charter laid the philosophical groundwork for the UN's founding principles of collective security.