Following advance extracts which appeared in Les Temps Modernes in 1948, Beauvoir published her revolutionary, two-volume investigation into woman's oppression, Le Deuxième Sexe ( The Second Sex ) in 1949. Although previous to writing this work she had never considered herself to be a "feminist," The Second Sex solidified her as a feminist figure for the remainder of her life. By far her most controversial work, this book was embraced by feminists and intellectuals, as well as mercilessly attacked by both the right and the left. The 70's, famous for being a time of feminist movements, was embraced by Beauvoir who participated in demonstrations, continued to write and lecture on the situation of women, and signed petitions advocating various rights for women. In 1970, Beauvoir helped launch the French Women's Liberation Movement in signing the Manifesto of the 343 for abortion rights and in 1973, she instituted a feminist section in Les Temps Modernes .