Jean-Paul Sartre was a French philosopher, novelist, playwright, and critic. He was a leading intellectual of the 20th century and the leading proponent of existentialism. This short book is a transcript of a speech Sartre gave in 1945 to address many of the critics of existentialism. It’s a *remarkably* lucid, concise exposition on the primary tenets of existentialism—even more remarkable given the fact that Sartre gave this lecture without notes. Big Ideas we explore: Anguish + its antidote, passion vs. choice, quietism vs. commitment, the stern optimism of existentialism and moral choices as a work of art.