14820. WHAT IS EXISTENTIALISM? ANTI-SYSTEMATIC PHILOSOPHY ACCORDING TO HEIDEGGER, SARTRE AND DE BEAUVOIR. This paper provides a definition and explication of the philosophy of existentialism according to three prominent existential philosophers (Heidegger, Sartre and de Beauvoir). The differences and similarities in these three philosophers’ point of view are discussed and the central contributions of each thinker to the philosophy of existentialism is identified. Argus that while each of these approaches is based on the original tenet of existentialism as a philosophy where existence comes before essence, the way these different thinkers go about explaining this dictum can be very different. KEYWORDS: existentialism existentialists Sartre Heidegger de beauvoir existence essence. Written 2003. 6 pages, 4 footnotes, 3 bibliographic sources. 1,495 words.