Jean-Paul Charles Aymard Sartre (21 June 1905 – 15 April 1980) was a French existentialist philosopher, playwright, novelist, screenwriter, political activist, biographer, and literary critic. He was one of the leading figures in 20th century French philosophy, particularly Marxism, and was one of the key figures in literary and philosophical existentialism. His work continues to influence fields such as Marxist philosophy, sociology, critical theory and literary studies. Sartre was also noted for his long non-monogamous relationship with the feminist author and social theorist Simone de Beauvoir. He was awarded the 1964 Nobel Prize in Literature but refused it.