The book opens with a biographical section, introducing the significant events in the life of the man who coined the term "existentialism." Then it examines Sartre's early philosophical works. Ideas from Sartre's other fictional and dramatic works are discussed, but the greatest part is the presentation of the main concepts from Sartre's (1943). These include the topics of consciousness, freedom, responsibility, absurdity, "bad faith," authenticity, and the hellish confrontation with other people. Finally, the book deals with Sartre's modification of his early existentialism to compliment his conversion to a kind of "existential" Marxism. summarizes the work of the most renown philosopher of the 20th Century.