Shmuel Rosner and Julian E. Zelizer discuss his latest book: "Abraham Joshua Heschel: A Life of Radical Amazement."   Julian Emanuel Zelizer is a professor of political history and an author in the United States at Princeton University. Zelizer has authored or co-authored several books about American political history; his focuses of study are the second half of the 20th century and the 21st century.     

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