"Marcuse’s forte was as a philosopher. His preoccupation with epistemology and dialectics was typical of a growing trend among Marxist writers seeking to challenge the Marxism that had been customary since 1917. Jean-Paul Sartre, whose early philosophical work was constructed on the basis of ideas drawn from Edmund Husserl and Martin Heidegger, published his Critique of Dialectical Reason in 1964. This was an attempt to bring together Marxism and the existentialist school in philosophy, and – unlike any previous Marxist thinker – Sartre argued for the crucial importance of the ‘autonomous’ and ‘self-conscious’ individual in explaining and justifying social activity. Lucio Colletti in Italy went back to Marx and suggested that Immanuel Kant rather than Georg Wilhelm Friedrich Hegel had exercised the deepest influence on his thought. Colletti’s work was admired by the French communist writer Louis Althusser. But Althusser placed his emphasis elsewhere, acknowledging that some bits of Marx’s work contradicted others. This was an extraordinary admission for a Marxist to make at that time. Althusser claimed that Marxism’s claim to analytical superiority lay in the scientific method and content of Marx’s later writings; he argued that the early corpus lacked the same rigour. Marcuse, Sartre, Colletti and Althusser were style-maestros of turgidity and never tried to rise to the flights of Marx and Engels in their inspired moments. Not one of them would choose a monosyllable if a longer word could be discovered or devised. Their Marxism, if not exactly pessimistic, was cramped and cautious. What is more, they were philosophers writing mainly for other philosophers. Only Marcuse became a genuine favourite of the thousands of students who rebelled in 1968 against ‘bourgeois society’ and university discipline, as well as the American war in Vietnam."