Since 1960, when Sartre published the first volume of his monumental Critique de la raison dialectique, the unfinished second volume achieved the status of the century's most keenly awaited philosophical work - finally published in 1985. In a book without parallel, Ronald Aronson provides a thorough explication of and commentary on this historic work of social philosophy. . . .[His] commentary can be used as a step-by-step guide through dense terrain. It is also significant as a work of original philosophical and historical reflection on the momentous issues of our century.