"Existentialism is a Humanism" is a lecture by Jean-Paul Sartre that serves as an accessible introduction to existentialist philosophy. In this work, Sartre argues that existentialism emphasizes individual freedom, choice, and responsibility. He rejects the notion that human beings have an inherent essence, asserting instead that existence precedes essence. This idea suggests that individuals define themselves through their actions and decisions, rather than conforming to predetermined roles or purposes. Sartre also addresses common criticisms of existentialism, particularly those that view it as a philosophy of despair. He counters this by emphasizing that existentialism empowers individuals to create their own values and meanings in life, rather than relying on external authorities or traditional frameworks. The concept of anguish arises from the realization of one's freedom and the weight of responsibility that comes with it. Ultimately, Sartre's existentialism promotes a sense of humanism, asserting that, despite the absence of a universal human nature, individuals can find fulfillment by embracing their freedom and engaging authentically with the world. This philosophy champions personal responsibility and encourages individuals to take charge of their own existence, fostering a sense of hope and agency in an otherwise indifferent universe.