"In the rotunda of the nation's Capital a statue pays homage to three famous nineteenth-century American women suffragists: Elizabeth Cady Stanton, Susan B. Anthony, and Lucretia Mott. "Historically," the inscription beneath the marble statue notes, "these three stand unique and peerless." In fact, the statue has a glaring omission: Lucy Stone. A pivotal leader in the fight for both abolition and gender equality, her achievements marked the beginning...