 This entry will negotiate Camus’s deliberate ambivalence as a philosopher while discussing his philosophy. It is not just a matter of giving a philosophical reading of this playwright, journalist, essayist, and novelist but of taking his philosophical writings seriously—exploring their premises, their evolution, their structure, and their coherence. To do so is to see that his writing contains more than a mood and more than images and sweeping, unsupported assertions, although it contains many of both. Camus takes his skepticism as far as possible as a form of methodical doubt—that is, he begins from a presumption of skepticism—until he finds the basis for a non-skeptical conclusion. And he builds a unique philosophical construction, whose premises are often left unstated and which is not always argued clearly, but which develops in distinct stages over the course of his brief lifetime. Camus’s philosophy can be thus read as a sustained effort to demonstrate and not just assert what is entailed by the absurdity of human existence. In the process Camus answers the questions posed by The Myth of Sisyphus, “Why should I not kill myself?”, and by The Rebel, “Why should I not kill others?”