One hundred years ago, the Nineteenth Amendment prohibited any state from denying the vote “on account of sex.” Fifty years earlier, the Fifteenth Amendment prohibited any state from denying the vote “on account of race, color, or previous condition of servitude.” Why wasn’t sex included then? This talk looks at the debates for and against women’s suffrage during those fifty years. Was the black vote gained at the expense of women? Was the woman vote gained at the expense of immigrants? We’ll consider how groups in America are often pitted against one another and what we might do about it.