Existentialist thinkers focus on individual existence, freedom, and choice. They explore the meaning of life and the human condition, emphasizing that people create their own values and purpose. Key figures include Jean-Paul Sartre, Simone de Beauvoir, and Albert Camus, who challenged traditional philosophical ideas about existence and morality. These philosophers argue that life is inherently absurd and that individuals must confront this reality. They encourage embracing personal responsibility and authenticity, suggesting that true fulfillment comes from making conscious choices. Existentialism has influenced literature, psychology, and the arts, shaping modern thought on human experience and identity.