This study examines the development of Marxist-Leninist ideology in the U.S.S.R. from its origins to the collapse of the Soviet regime. Alfred Evans argues that Soviet Marxism-Leninism was subject to significant adaptation under various leaders, contrary to the widespread impression that official Soviet ideology remained static after Stalin. While taking account of scholarly literature on each of the periods covered, the work is significant for being based principally on an analysis of primary (Soviet) sources. Evans' integrated analysis of changes in ideology during the post-Stalin decades is an important contribution to the literature in political science, political economy, and Soviet studies.