Johann August Strindberg was a Swedish playwright, novelist, and essayist who is considered one of the most influential figures in Swedish literature. He is known for his innovative and often controversial works, which often explored themes of naturalism, expressionism, and the human psyche. Strindberg's writing often delved into the complexities of human relationships and the struggles of the individual in society. His works have had a lasting impact on the development of modern drama and literature.