• AP Photo/Seth Wenig
  • New York Mayor Bill De Blasio kisses his wife, Chirlane McCray, at his inauguration last week, as their children, Chiara and Dante, look on. De Blasio has vowed to target income inequality.

There’s a growing consensus about fighting income inequality, but Ross Douthat is not part of it. The New York Times columnist yesterday questioned whether such a campaign ought to even be attempted.

The evidence for pre-K is not yet quite as compelling as the evidence that human activity is a key cause of climate change—but it’s getting there. Here’s the link Douthat provided; and here’s the other side—a post from an economist that cites studies in Massachusetts, Oklahoma, Michigan, New Jersey, West Virginia, South Carolina, Arkansas, and New Mexico, which all found large, positive effects on test scores from a year of preschool.

Well, it’s not impossible. And the increasing focus of late on inequality is laudable and reason for hope. But, yes: a more equitable division of the nation’s wealth requires more sharing not just by the megarich but also by the comfortable.