This is the first volume of the first biography of Abraham Joshua Heschel, one of the outstanding Jewish thinkers of the twentieth century. Edward K. Kaplan and Samuel H. Dresner trace Heschel’s life from his birth in Warsaw in 1907 to his emigration to the United States in 1940, describing his roots in Hasidic culture, his experiences in Poland and Germany, and his relations with Martin Buber.