When Simone de Beauvoir's landmark book, "The Second Sex" landed on shelves in 1949, sex differences were clearly defined: people born male were men, and people born female were women.
De Beauvoir's book challenged this assumption, writing, "One is not born, but rather becomes, a woman."
Accompanying the story was a photo of a large group of Brown University students, standing together silently to protest the university's alleged inadequate response to two sexual misconduct cases.