It's the end of the world!! Head for the hills!!! No, wait. Don't head for the hills—they're full of Islamist terrorist camps. Let me put it in a slightly bigger nutshell: much of what we loosely call the Western world will not survive the twenty-first century, and much of it will effectively disappear within our lifetimes, including many if not most European countries. There'll probably still be a geographical area on the map marked as Italy or the Netherlands—probably—just as in Istanbul there's still a building known as Hagia Sophia, or St. Sophia's Cathedral. But it's not a cathedral; it's...