This book provides a rigorous social historical study of Eastern and East Central European Jewry with a specific focus on women. It demonstrates that only through the experiences of women can one fully understand key phenomena such as the momentous changes occurring in Jewish education, conversion waves, postwar relief efforts, anti-Jewish violence, Soviet productivization projects, and, more broadly, the acculturation that animated Jewish modernization. Rather than present a scenario in which secularism simply displaces traditionalism, the chapters in this book suggest a mutually transformative secularist-traditionalist encounter within which Jewish women were both prominent and instrumental. Chapter "'To Write? What's This Torture For?' Bronia Baum's Manuscripts as Testimony to the Formation of a Write, Activist, and Journalist" is available open access under a Creative Commons Attribution 4.0 International license via link.springer.com.