We’ve also seen Wesleyan students debate cutting funding for the student newspaper after it ran an op-ed criticizing the Black Lives Matter movement. At Mount Holyoke, students canceled a production of “The Vagina Monologues” because they felt it excluded transgender women. Protests led to the withdrawal of Condoleezza Rice as commencement speaker at Rutgers and Christine Lagarde at Smith.

This is sensitivity but also intolerance, and it is disproportionately an instinct on the left.

I’m a pro-choice liberal who has been invited to infect evangelical Christian universities with progressive thoughts, and to address Catholic universities where I’ve praised condoms and birth control programs. I’m sure I discomfited many students on these conservative campuses, but it’s a tribute to them that they were willing to be challenged. In the same spirit, liberal universities should seek out pro-life social conservatives to speak.

More broadly, academia — especially the social sciences — undermines itself by a tilt to the left. We should cherish all kinds of diversity, including the presence of conservatives to infuriate us liberals and make us uncomfortable. Education is about stretching muscles, and that’s painful in the gym and in the lecture hall.