Lessons of Soviet experience, by L. Huberman and P.M. Sweezy.-The successes, the failures, and the prospects, by H. Braverman.-What went wrong? by S.Lynd.-Hurrah for the Russian Revolution! By S. Nearing.-The October Revolution and half a century, by M.Dobb.- The economic reforms, by J. Robinson.- The new economic course, by L. Foa.-From October to the cultural revolution, by I.B. Tabata.- Incentives to work and the transition to communism, by H. Blumenfeld. -Socialism self-defined: 1917-1967. by R. Schlesinger.