The Soviet political system: transformation or degeneration? By Z. Brzezinski.--Changes in Russia: the need for perspective, by F. C. Barghoorn.--A muddling evolution, by A. Schlesinger, Jr.--The realities of a vision, by E. Lyons.--A bureaucracy under fire, by G. Galli.--Immobilism and decay, by R. Conquest.--Totalitarian rule and social change, by B. Meissner.--The changes ahead, by J. Bandyopadhyaya.--The crises ahead, by I. D. Levine.--Beyond Libermanism, by E. Halperin.--Evolution and detente, by J. Clark.--The USSR and Eastern Europe, by A. Bregman.--Roads to the future, by M. Fainsod.--The evolution of the Soviet system, by A. Levi.--Concluding reflections, by Z. Brzezinski.