‘We want fewer and better children . . . and we cannot make the social life and the world-peace we are determined to make, with the ill-bred, ill-trained swarms of inferior citizens that you inflict on us.” That ghastly message appeared in the introduction to Margaret Sanger’s 1922 book, The Pivot of Civilization. In a little-noticed incident, Secretary of State Hillary Clinton recently announced that she is “really in awe” of Sanger. “The 20th-century reproductive-rights movement, really embodied in the life and leadership of Margaret Sanger, was one of the most transformational in the entire history of the human race,”...