Simone de Beauvoir (1908-86) was a French existentialist philosopher who employed a literary-philosophical method in her essays, including Ethics of Ambiguity (1946) and The Second Sex (1949), as well as in her novels, multivolume autobiography, and other works. Sylvie Le Bon de Beauvoir, adopted daughter and literary executor of Simone de Beauvoir, is the editor of Lettres à Sartre and many other works by Beauvoir. Margaret A. Simons is a professor and chair of philosophy at Southern Illinois University, Edwardsville, and the author of Beauvoir and The Second Sex: Feminism, Race and the Origins of Existentialism. Anne Deing Cordero is professor emerita of French at George Mason University.