At the start of the twenty-first century, America was awash in a sea of evangelical talk. The Purpose Driven Life. Joel Osteen. The Left Behind novels. George W. Bush. Evangelicalism had become so powerful and pervasive that political scientist Alan Wolfe wrote of "a sense in which we are all evangelicals now." Steven P. Miller offers a dramatically different perspective: the Bush years, he argues, did not mark the pinnacle of evangelical influence,...