Among the great figures of Progressive Era reform, Edith and Grace Abbott are perhaps the least sung. Peers, companions, and coworkers of legendary figures such as Jane Addams and Sophonisba Breckinridge, the Abbott sisters were nearly omnipresent in turn-of-the-century struggles to improve the lives of the poor and the working-class people who fed the industrial engines and crowded into diverse city neighborhoods. Grace's innovative role as a leading champion for the rights of children, immigrants, and women earned her a key place in the history of the social justice movement. As her friend...