Hugh Ragsdale's analysis of East European documentation sheds new light on the Munich Crisis. If Hitler had been stopped at Munich, World War II, as we know it, could not have happened. The Crisis has been thoroughly studied in British, French, and German documents, and, consequently, we have learned that the weakness in the Western position at Munich consisted of the Anglo-French opinion that the Soviet commitment to its allies--France and Czechoslovakia--was utterly unreliable. Ragsdale's findings will contribute to a "considerable shift" of opinion.