Which author is known for exploring the themes of existentialism in their works?

Albert Camus is recognized for his significant contributions to existentialist literature. His works, such as "The Stranger" and "The Myth of Sisyphus," delve into themes of absurdity, the quest for meaning, and the individual's role in an indifferent universe. Camus argues that life can often seem meaningless, yet individuals must confront this reality and embrace their freedom and responsibility to create their own meaning. His exploration of existential themes set a foundational tone for 20th-century thought and literature, making him a pivotal figure in the discussion of existentialism.

The other authors listed, while significant in their own rights, focus on different themes. Willa Cather often centers on the American pioneer experience, Kate Chopin is known for exploring issues of gender and social norms in her works, and Anton Chekhov primarily examined the complexities of human relationships and societal issues, particularly through the lens of realism rather than existentialism.