This document discusses the theme of existentialism. It defines existentialism as a philosophy that emphasizes human freedom and responsibility. Some key factors that influence freedom of choice are listed. Major themes of existentialism are then outlined, including a focus on concrete human existence, existence preceding essence, moral individualism, authenticity, angst, freedom, and the absurd. The concepts of existence preceding essence and authenticity are further explained. Characteristics of theater of the absurd are also defined. Finally, some influential movies with existential themes are listed.