The Nobel Prize-winning author remembered for his existentialist works is Jean-Paul Sartre. Sartre's literary and philosophical contributions focus on themes such as freedom, absurdity, and the human condition. His most famous works include "Being and Nothingness" and "Nausea," which explore the complexities of existence and individual responsibility. Sartre's philosophy emphasizes that individuals must create their own essence through choices and actions, presenting a worldview that rejects inherent meaning in life. His ideas have had a profound influence on literature, philosophy, and political thought, making him a pivotal figure in 20th-century intellectual history.