I USE this title, because not only is Sartre a philosophical dramatist, but he is also a dramatic philosopher. I mean, that when he philosophizes he dramatizes his philosophical concepts. You cannot fully understand his philosophical drama unless you have an inkling of his dramatic philosophy. That is why when “existentialism” was all the rage in France (and elsewhere) about eleven years ago, but of course nobody had read L'Etre et le Néant, it was possible to get such a totally wrong idea of what Sartre was trying to do. (You will remember the story he himself tells of the young woman who utters a rude word and then exclaims “Ah, je crois que je deviens existentialiste.“) I must start, therefore, with the briefest account of his philosophical system, for the sake of those unfamiliar with it.