MARK STEYN: It’s Still The Demography, Stupid. “The western world is going out of business because it’s given up having babies. The 20th century welfare state, with its hitherto unknown concepts such as spending a third of your adult lifetime in ‘retirement,’ is premised on the basis that there will be enough new citizens to support the old. But there won’t be. . . . Enter Islam, which sportingly volunteered to be the children we couldn’t be bothered having ourselves, and which kind offer was somewhat carelessly taken up by the post-Christian west.”