Alone among the creatures of the world, man suffers a pang both bitter and sweet. It is an ache for the homecoming. The Greeks called it nostalgia. Post-modern man, homeless almost by definition, cannot understand nostalgia. If he is a progressive, dreaming of a utopia to come, he dismisses it contemptuously, eager to bury a past he despises. If he is a reactionary, he sentimentalizes it, dreaming of a lost golden age. In this...