The Second Sex
 The Second Sex (French: Le Deuxième Sexe) is a 1949 book by the French existentialist Simone de Beauvoir. One of her best-known books it deals with the treatment of women throughout history and is often regarded as a major work of feminist philosophy and the starting point of second-wave feminism. Beauvoir researched and wrote the book in about 14 months when she was 38 years old. She published it in two volumes and some chapters first appeared in Les Temps modernes.