Seventy percent of Americans (and counting) think so. The real wage of a US worker today is less than it was 40 years ago—but there are four times as many multimillionaires. As inequality grows, the politics become more poisonous. Every year, more and more Americans go on shooting sprees, killing strangers and passers-by—and now, increasingly, representatives of the state.
Troubling trends of this kind are endlessly discussed by public intellectuals and social scientists. But mostly, they talk...