Simone-Ernestine-Lucie-Marie Bertrand de Beauvoir, often shortened to Simone de Beauvoir, was a French existentialist philosopher, public intellectual, political activist, feminist theorist and social theorist. She did not consider herself a philosopher but her significant contributions to existentialism and feminist existentialism have solidified her legacy as a philosopher and feminist. She wrote novels, essays, biographies, an autobiography in several volumes, and monographs on philosophy, politics, and social issues. 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.