Simone Lucie Ernestine Marie Bertrand de Beauvoir (Paris, January 9, 1908-ib., April 14, 1986) was a French philosopher, teacher and writer. She was a fighter for equal rights for women. She wrote novels, essays, biographies, and monographs on political, social, and philosophical topics. Her thinking is part of the philosophical current of existentialism and her work The Second Sex is considered fundamental in the history of feminism. She was a partner of the philosopher Jean-Paul Sartre.