No figure among the western Marxist theoreticians has loomed larger in the postwar period than Louis Althusser. A rebel against the Catholic tradition in which he was raised, Althusser studied philosophy and later joined both the faculty of the Ecole normal superieure and the French Communist Party in 1948. Viewed as a "structuralist Marxist," Althusser was as much admired for his independence of intellect as he was for his rigorous defense of...