Compared with the rest of the (nationally representative) polling sample, progressive activists are much more likely to be rich, highly educated—and white. They are nearly twice as likely as the average to make more than $100,000 a year. They are nearly three times as likely to have a postgraduate degree. And while 12 percent of the overall sample in the study is African American, only 3 percent of progressive activists are. With the exception of the small tribe of devoted conservatives, progressive activists are the most racially homogeneous group in the country.

If age and race do not predict support for political correctness, what does? Income and education.

While 83 percent of respondents who make less than $50,000 dislike political correctness, just 70 percent of those who make more than $100,000 are skeptical about it. And while 87 percent who have never attended college think that political correctness has grown to be a problem, only 66 percent of those with a postgraduate degree share that sentiment.

Among devoted conservatives, 97 percent believe that political correctness is a problem. Among traditional liberals, 61 percent do. Progressive activists are the only group that strongly backs political correctness: Only 30 percent see it as a problem.