This book explores the social and political activism of American Jewish women from approximately 1890 to the beginnings of World War II. It demonstrates that no history of the birth control, suffrage, or peace movements in the United States is complete without analyzing the impact of Jewish women's presence. The book is based on years of extensive primary source research in more than a dozen archives and among hundreds of primary sources, many of which have previously never been seen. Personal papers and institutional records paint a vivid picture of a world in which both middle-class and working-class American Jewish women were consistently and publicly engaged in all the major issues of their day and worked closely with their non-Jewish counterparts on behalf of activist causes. The book makes a unique contribution to the study of modern women's history, modern Jewish history, and the history of American social movements.