"Existentialism is not a school of thought nor reducible to any set of tenets. The three writers who appear invariably on every list of "ex- istentialists"-Jaspers, Heidegger, and Sartre- are not in agreement on essentials. Such alleged precursors as Pascal and Kierkegaard differed from all three men by being dedicated Christians; and Pascal was a Catholic of sorts while Kierkegaard was a Protestant's Protestant. If, as is often done, Nietzsche and Dostoevsky are included in the fold, we must make room for an impassioned anti-Christian and an even more fanatical Greek-Orthodox Russian imperialist. By the time we consider adding Rilke, Kafka, and Camus, it becomes plain that one essential feature shared by all these men is their perfervid individual- ism.