Nelly Roussel (1878-1922)--the first feminist spokeswoman for birth control in Europe--challenged both the men of early twentieth-century France, who sought to preserve the status quo, and the women who aimed to change it. She delivered her messages through public lectures, journalism, and theater, dazzling audiences with her beauty, intelligence, and disarming wit. She did so within the context of a national depopulation crisis caused by the confluence of low birth rates, the rise of international tensions, and the tragedy of the First World War. While her support spread across social...