The Russian Revolution has not yet achieved the status of the French Revolution as an academic preserve for battalions of professional historians, but few are likely to deny that its impact on the twentieth century is already more profound than that of the French upheaval on the nineteenth. The fiftieth anniversary of the Russian Revolution is now upon us, and it is a melancholy commentary on the uncertain intellectual climate of the Soviet Union that despite lavish funds, abundant trained personnel, and access to archives and primary sources unavailable in the West, Soviet historians have failed to produce a work of permanent importance on this crucial episode of modern Russian history. Yet the stifling orthodoxy of Stalinism has given way to the uncertain but relative freedom under his successors, and the auguries point to a further mellowing of the party line as Soviet society haltingly approaches the educational and living standards of the Western world.