Schweid concludes his history of modern Jewish thought by narrating two major progressions in Diaspora Jewish thought of the early twentieth century: (1) the varied responses of ultra-Orthodox Diaspora Jewish thinkers to the Holocaust (Wasserman, Shapira, Ashlag, Dessler, Teichthal, Rokea?, and Yosef Yitz?ak Schneersohn) and (2) the formative thinkers of the major movements in American Jewish thought (Kohler, Schechter, Kaplan, Herberg, Strauss, Soloveitchik, and Heschel).