Op-Ed Contributor: Social Media Is Making Us Dumber. Here's Exhibit A.

This week, a video surfaced of a Harvard professor, Steven Pinker, which appeared to show him lauding members of a racist movement. The clip, which was pulled from a November event at Harvard put on by Spiked magazine, showed Mr. Pinker referring to "the often highly literate, highly intelligent people who gravitate to the alt-right" and calling them "internet savvy" and "media savvy." The neo-Nazi Daily Stormer website ran an article headlined, in part, "Harvard Jew Professor Admits the Alt-Right Is Right About Everything." A tweet of the video published by the self-described "Right-Wing Rabble-Rouser" Alex Witoslawski got hundreds of retweets, including one from the white-nationalist leader Richard Spencer. "Steven Pinker has long been a darling of the white supremacist'alt-right,'" noted the lefty journalist Ben Norton.