In a new book about the constitutional separation of church and state, Pulitzer Prize-winning historian Garry Wills insists that that separation was meant as "the great protector of religion, not its enemy." That, as Wills tells guest host Dave Davies, hasn't stopped fervent believers from challenging the concept.
Wills, a translator of St. Augustine and author of What Jesus Meant, is an emeritus professor of history at Northwestern University; the new book is titled Head and Heart: American Christianities.
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