"I enjoyed the late 1960s as much as anyone, and I regarded much of the political ferment of the time as vital to the survival of our society—the Vietnam war might have gone on for many decades more without it. But the era did have its silly side, and the search for the immediately relevant at the expense of the less immediately practical side was, to me, one of the sillier aspects of it. Throwing most of past human knowledge overboard for the sake of bringing about instant social reform did not strike me as an effective way of achieving anything but ignorance. Evidently it seemed that way to others, too: after a while the traditional sciences and historical subjects returned to the curriculum, Shakespeare and Sophocles were allowed back in also, and not a great deal was heard from the earnest, deadly young decreers of non-negotiable demands who had had such power over academic life for a time. (Although a lot of them grew up and became university professors, and they are behind the modern craze for political correctness that has spread so much terror through our academic institutions.)"