Since the summer of 1949 a number of resolutions embodying proposals for world or regional federation have been pending in the Congress of the United States. During the early months of 1950, extended hearings on these various proposals have been held by the Senate Subcommittee on Foreign Relations headed by Senator Elbert Thomas. The purpose of this article is to present a critical study of the background, content, and the implications of the projects thus submitted for congressional action.