But over the past few decades, the Republican Party has driven away people who live in cities, in highly educated regions and on the coasts. This expulsion has had many causes. But the big one is this: Republican political tacticians decided to mobilize their coalition with a form of social class warfare. Democrats kept nominating coastal pointy-heads like Michael Dukakis so Republicans attacked coastal pointy-heads.

Over the past 15 years, the same argument has been heard from a thousand politicians and a hundred television and talk-radio jocks. The nation is divided between the wholesome Joe Sixpacks in the heartland and the oversophisticated, overeducated, oversecularized denizens of the coasts.

What had been a disdain for liberal intellectuals slipped into a disdain for the educated class as a whole. The liberals had coastal condescension, so the conservatives developed their own anti-elitism, with mirror-image categories and mirror-image resentments, but with the same corrosive effect.