The Dumbarton Oaks Conference or, more formally, the Washington Conversations on International Peace and Security Organization was an international conference at which the United Nations was formulated and negotiated among international leaders. The conference was held at Dumbarton Oaks from August 21, 1944, to October 7, 1944.
The Dumbarton Oaks Conference constituted the first important step taken to carry out paragraph 4 of the Moscow Declaration of 1943, which recognized the need for a postwar international organization to succeed the League of Nations. At the conference, delegations from Republic of China, the Soviet Union, the United Kingdom, and the United States deliberated over proposals for the establishment of an organization to maintain peace and security in the world. Among the representatives were the British Permanent Under-Secretary of State for Foreign Affairs, Sir Alexander Cadogan; Soviet Ambassador to the United States, Andrei Gromyko; Chinese Ambassador to the United Kingdom, Wellington Koo; and U.S. Under-Secretary of State Edward Reilly Stettinius, Jr., each of whom chaired his respective delegation. (When Cadogan was called back to London after the first half of the conference, leadership of the delegation was assumed by E. F. L. Wood, 1st Earl of Halifax, the British ambassador in Washington.) The conference itself was chaired by Stettinius, and U.S. Secretary of State Cordell Hull delivered the opening address.
The conversations were held in two phases, since the Soviets were unwilling to meet directly with the Chinese. In the first phase, representatives of the Soviet Union, the United Kingdom, and the United States convened between August 21 and September 28. In the second, representatives of Republic of China, the United Kingdom, and the United States held discussions between September 29 and October 7.
Robert Woods Bliss, who with his wife, Mildred Barnes Bliss, had given Dumbarton Oaks to Harvard University in 1940 to establish a scholarly research institute and museum in Byzantine studies, was instrumental in arranging for these meetings. Already in June 1942, on behalf of the director, John S. Thacher, and the Trustees for Harvard University, he had offered to place the facilities of Dumbarton Oaks at the disposal of Secretary Hull. When in June 1944 the State Department found that Dumbarton Oaks could "comfortably accommodate" the delegates and that "the environment [was] ideal", the offer was renewed by James B. Conant, the president of Harvard University, in a letter of June 30, 1944.