French philosopher and political activist Jean-Paul Sartre was born on June 21, 1905, in France. Born in France, Sartre became famous for his theory of existentialism which has been popularized widely. Sartre was also known for his theory of phenomenology. Being a leading figure in 20th-century French philosophy and Marxism, Jean-Paul Sartre's work influenced sociology, critical theory, post-colonial theory, and literary studies. For his contribution...