Cancel culture has reared its ugly head once again, and this time in a new and unprecedented way.

A lecture by a physicist was canceled at one of America’s premier institutions of science, Massachusetts Institute of Technology, for reasons having nothing to do with the subject of the lecture. The lecture was canceled not because of its scientific content but because of the politically incorrect views on diversity of the scientist scheduled to give the lecture.

Dorian Abbot is a professor in the department of the geophysical sciences at the...