Credit: George S. ZImbel/Getty

Having ignored questions of economic inequality for decades, economists and other scholars have recently discovered a panoply of effects that go well beyond the fact that some people have too much money and many don’t have enough. Inequality affects our physical and mental health, our ability to get along with one another and to make our voices heard and our political system accountable, and, of course, the futures that we can offer our children. Lately, I’ve noticed a feature of economic inequality that has not received the attention it deserves. I call it “intellectual inequality.”

I do not refer to the obvious and ineluctable fact that some people are smarter than others but, rather, to the fact that some people have the resources to try to understand our society while most do not. Late last year, Benjamin M. Schmidt, a professor of history at Northeastern University, published a study demonstrating that, for the past decade, history has been declining more rapidly than any other major, […]