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

Steven Pinker is a liberal, Jewish professor. But social media convinced people that he’s a darling of the alt-right.

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 clip went viral. The right celebrated; the left fumed. The neo-Nazi Daily Stormer website ran an article ...