A graphomane, he ground out the later works under the influence of opiates and alcohol. Yet now, as often happens, Sartre's reputation is reviving. Perhaps the most important aspect of this recuperation lies in his tireless defense (equalling that of Voltaire) of the downtrodden and dispossessed, especially people of color. With rising inequality both within and between societies today, these interventions seem very timely - though of course some of the details have not held up. His critique of anti-Semitism, though challenged in some respects, was courageous and innovative. Likewise the rare but generally sympathetic comments about homosexuals. Not to be forgotten is his close partnership with Simone de Beauvoir, whose feminism he encouraged.
I continue to struggle with my ambivalence, inflected by great admiration, with regard to J-P Sartre. As far as I know there is no comprehensive account of the fluctuations of his reputation since his death 35 years ago. At this distance, the dialogue is hard to trace as much of it is in periodicals.
Still, there seem to be three main areas of contention: 1) the record of Sartre and de Beauvoir in WWII, which was less sterling and more procrastinating than later accounts often have it; 2) his tendency to excuse Communist and third-world dictatorships as somehow the party of humanity (very late, he partially recanted); and 3) his tortured effort to reconcile existentialism and Marxism in the two ultraturgid volumes of the Critique of Dialectical Reason.