Abraham Joshua Heschel (1907–1972) was one of the most prominent Jewish theologians and philosophers of the twentieth century. Born in Poland, he moved to America in 1940. Maintaining that religion and justice were inseparable, he was active in the civil rights and anti-war movements. His books include The Earth Is the Lord’s (1950), Man Is Not Alone: A Philosophy of Religion (1951), The Sabbath: Its Meaning to Modern Man (1951), Man’s Quest for God: Studies in Prayer and Symbolism (1954), God in Search of Man: A Philosophy of Judaism (1956); and The Prophets (1962).