It is a truism that America has become a more diverse country. It is also a beautiful thing to watch. Visitors from other countries, particularly those having trouble incorporating different ethnic groups and faiths, are amazed that we manage to pull it off. Not perfectly, of course, but certainly better than any European or Asian nation today. It's an extraordinary success story. [...]

But the fixation on diversity in our schools and in the press has produced a generation of liberals and progressives narcissistically unaware of conditions outside their self-defined groups, and indifferent to the task of reaching out to Americans in every walk of life. At a very young age our children are being encouraged to talk about their individual identities, even before they have them. By the time they reach college many assume that diversity discourse exhausts political discourse, and have shockingly little to say about such perennial questions as class, war, the economy and the common good. In large part this is because of high school history curriculums, which anachronistically project the identity politics of today back onto the past, creating a distorted picture of the major forces and individuals that shaped our country. (The achievements of women's rights movements, for instance, were real and important, but you cannot understand them if you do not first understand the founding fathers' achievement in establishing a system of government based on the guarantee of rights.)

When young people arrive at college they are encouraged to keep this focus on themselves by student groups, faculty members and also administrators whose full-time job is to deal with -- and heighten the significance of -- "diversity issues." Fox News and other conservative media outlets make great sport of mocking the "campus craziness" that surrounds such issues, and more often than not they are right to. Which only plays into the hands of populist demagogues who want to delegitimize learning in the eyes of those who have never set foot on a campus. How to explain to the average voter the supposed moral urgency of giving college students the right to choose the designated gender pronouns to be used when addressing them? How not to laugh along with those voters at the story of a University of Michigan prankster who wrote in "His Majesty"?

This campus-diversity consciousness has over the years filtered into the liberal media, and not subtly. Affirmative action for women and minorities at America's newspapers and broadcasters has been an extraordinary social achievement -- and has even changed, quite literally, the face of right-wing media, as journalists like Megyn Kelly and Laura Ingraham have gained prominence. But it also appears to have encouraged the assumption, especially among younger journalists and editors, that simply by focusing on identity they have done their jobs.