Jean-Paul Charles Aymard Sarte (June 21, 1905- April 15, 1980). He was a French literary critic, biographer, political activist, screenwriter, novelist, playwright, and philosopher.
He was also known to be in an open relationship with fellow existentialist and prominent feminist Simone de Beauvoir. Together they challenged many social and cultural expectations and assumptions of their upbringing.
They considered the traditional lifestyle as bourgeois in thought and life as general. His general theme of work represented an authentic way of living on one’s terms and dispelling conformity.
Some of his famous works are- Being, and Nothingness(L’Être et le Néant, 1943) and Existentialism Is a Humanism (L’existentialisme est un humanisme, 1946); in 1964, he was awarded the Nobel Prize in Literature, which he initially declined because he thought that a writer should never be made into an institution.