El Segundo Sexo4. 14 Stars Ratings Ao Publicacin: 1949 Ao Edicin: 2018 ReseaThe Second Sex is a hymn to human freedom and a classic of the existentialist movement. It also has claims to be the most important s ingle book in the history of feminism. In the forty years since its publication De Beauvoir's then revolutionary thesis that the subordination of women is not a fact of nature but the product of social conditioning has become part of our everyday thinking.