The UN is an outgrowth of the
Atlantic Charter. It appeared in the
Declaration by United Nations on January 1, 1942, in which 26 nations pledged to continue fighting the
Axis powers. Their main inspiration was the
League of Nations; however, their goals were to rectify the League's imperfections in order to create an organization that would be "the primary vehicle for maintaining peace and stability." Roosevelt's main role was to convince the different allies, especially
Winston Churchill of the
United Kingdom and
Joseph Stalin of the
Soviet Union, to join the new organization. "Roosevelt saw the United Nations as the crowning achievement of his political career." Roosevelt's envoy
Wendell Willkie played a key role in promoting the idea of the United States joining the new organization, publishing
One World in April 1943. In September 1943, 81 percent of Americans—up from 63 percent in February—supported joining a "union of nations" after the war. In 1945, representatives from 50 countries met in
San Francisco for the
United Nations Conference on International Organization. They deliberated on proposals that had been drafted by representatives of the
Republic of China, the
Soviet Union, the
United Kingdom and the
United States at the
Dumbarton Oaks Conference between August and October 1944. Roosevelt, Churchill and Stalin reviewed the Dumbarton Oaks proposal during the Yalta Conference in February 1945. The purpose of the conference was to discuss post-war settlements and to reach a final agreement concerning "the UN's structure and membership and set the date of the San Francisco organizing conference." The world leaders eventually agreed on Roosevelt's proposal to give certain members a veto power so "that the Organization could take no important action without their joint consent." Though the veto power question created a lot of disagreement among the different signatories, its inclusion in the charter was never a matter of negotiation for Roosevelt and his allies. Finally, during the Yalta conference, Stalin agreed to make the USSR a member of the United Nations. Over subsequent decades, this new system opened world markets and promoted a liberal economy. It was implemented through different institutions, such as the
World Bank and the
International Monetary Fund, which went on to work with the United Nations but remained independent from it. On July 28, 1945, the
United States Senate (as part of the
79th United States Congress) ratified the
United Nations Charter by a vote of . (By comparison, the Senate had voted in favor of joining the
League of Nations, short of the required two-thirds majority for ratification.) The
United Nations officially came into existence on October 24, 1945, when all of the
Permanent Five (the
Republic of China,
France, the
Soviet Union, the
United Kingdom, and the
United States) as well as a majority of other signatories had ratified the Charter. The United Nations was the first
international governmental organization to receive significant support from the United States. Its forerunner, the
League of Nations, had been championed by
Woodrow Wilson after
World War I to prevent future conflicts. While it was supported by most
nations of Europe, it was never ratified by the
United States Congress due to the inability to reach a compromise regarding the
Lodge Reservations or the
Hitchcock Reservations. Shortly after the establishment of the United Nations, the United States came into conflict with another member of the Security Council. Since the
Soviet Union was a
permanent member of the
United Nations Security Council, it had the power to
veto any binding UN resolution. In fact, Soviet
foreign minister and UN
ambassador Vyacheslav Molotov used veto power twice as often as any other permanent member, earning him the title "Mr. Veto". Relations between the United States and the Soviet Union (later Russia) within the UN have evolved in step with the larger geopolitical situation between the two powers. While the Soviet Union was boycotting the Security Council and
China's seat was represented by U.S.-friendly
Republic of China (instead of the
communist People's Republic of China which would replace the ROC in the UN in 1971), the U.S. and UN jointly condemned the
invasion of South Korea by
North Korean troops, leading to the UN sanctioned
Korean War. Later, the U.S. persuaded all permanent members of the Security Council to authorize force against
Ba'athist Iraq in the
Gulf War of 1991. This was a major step toward U.S. and Russian reconciliation in the
post–Cold War era. == Sources of conflict ==