Simone Lucie Ernestine Marie Bertrand de Beauvoir
- "La Beauvoir" redirects here; also see: Beauvoir .
, called Simone de Beauvoir
(; January 9, 1908 — April 14, 1986), was a French writer, existentialist philosopher, feminist, Marxist, and social theorist. She wrote novels, monographs on philosophy, politics, and social issues, essays, biographies, and an autobiography in several volumes. She is now best known for her metaphysical novels, including She Came to Stay
and The Mandarins
, and for her 1949 treatise The Second Sex
, a detailed analysis of women's oppression and a foundational tract of contemporary feminism. She is also noted for her lifelong polyamorous relationship with Jean-Paul Sartre.