Author and historian Rick Perlstein is a seismologist of the chaotic American political landscape. His four volumes on the rise of modern conservatism have traced our cultural fault lines from the failed Republican presidential bid of Barry Goldwater in the 1960s to the success of Ronald Reagan in the 1980s. Over the past two decades the fifty-two-year-old has become a prominent chronicler of America’s rightward shift, charting the tectonic movements beneath the surface to show how today’s political divisions are the unmistakable aftershocks of earthquakes long ago.