Most Americans know that higher education has for several decades been in the grip of a deeply intolerant, fanatical and uncompromising strain of progressive activism. Students and sometimes even faculty members regularly chase heterodox speakers off campus, demand complete fealty from terrified campus bureaucracies, and denounce and destroy each other over the slightest and most inconsequential ideological deviations. The environment isn’t unlike George Orwell’s “Animal Farm,” a place where “no one dared speak his mind, when fierce, growling dogs roamed everywhere, and when you had to watch your comrades torn to pieces...