There have been many strange scenes in this era of coronavirus pandemic, anti-racism unrest, and woke recriminations, but perhaps none have been stranger than one that took place on Zoom late last month, when 115 people, appearing in little squares on computer screens, held a kind of trial, a somewhat secret one at that, closed to the press, its participants barred from talking about it to outsiders afterwards. The episode illustrates the tense workings of cancel culture preoccupying an American institution. In the dock, and visible in his own little square, was Carlin Romano, a writer, philosopher, book critic and,...