The first concrete step toward the creation of a general international organization was taken in the late summer of 1944, when the Dumbarton Oaks Conversations took place. The first phase of the conversations was between the representatives of the U.S.S.R., the United Kingdom, and the United States from August 21 to September 28. The second phase between the representatives of China, the United Kingdom, and the United States took place from September 29 to October 7. As a result of these conversations, the four powers reached a number of agreements which were embodied in the Dumbarton Oaks Proposals.
Further Reading: Robert C. Hildebrand, Dumbarton Oaks: The Origins of the United Nations and the Search for Postwar Security (1990)