tlw super-powers and the need for intellectual freedom which he sees as necessary and essential to human society. The twin issues of survival and freedom he regards as interlinked, and by implication criticizes not only his own society, but also what he regards as its mirror-image in the West. He sets out a four stage plan for co-operation in the development of mankind, and foresees a convergence between social systems, in order to allow the Soviet Union and the United States "having overcome their alienation, (to) solve the problem of saving the poorer half of the world", he foresees that in this period running up to the late 1980's that disarmament will proceed. In the fourth stage he foresees that "the Sociatist convergence Mil reduce differences in social structure, promote intellectual freedom, science and economic progress and lead to the creation of a world government and the smoothing of national contradictions" by the year 2000. Although this volume is rather slim, it is nonetheless interesting to read at first hand the observations of a man woo is particularly and vitally concerned with the relationship betw~en human values and social organization. His ability to survive while criticizing his own society so trenchantly, no doubt hinges on his achievements as the father CYf the Soviet hydrogen-bomb, his pre-eminence amongst the scientific community in his country, and of course his visibility vis-!-vis public opinion in the West. His analysis is probably not as directly relevant as those described in the volumes reviewed above, but IWnetheless his refteotions are worth comparing with the others as he is, as they are, an articulate spokesman for dissent, and one who has an original concept CYf social architecture which may temper the explosive forces that threaten humanity with literal extinction. MALCOLM WARNER