A thorough, scholarly review of the Big Three meeting at Teheran in November-December 1943, and of the meetings preceding and immediately following. A British historian makes the persuasive argument that these conferences showed F.D.R. shifting his principal interest from Great Britain to the U.S.S.R., trying hard to obtain Soviet trust and cooperation, and in doing so allowing opportunities to slip which made Soviet rule in Poland and domination of Eastern Europe highly probable. The book reaffirms an old version of the United States as suspicious of British imperialism and insouciant about Soviet aims. Conventional in approach, incisive in interpretation-an important contribution to the study of the origins of the cold war.