So says Mark Steyn here and here. (Hat tip: Instapundit.) Demographics are indeed critically important, but trends change; predictions of them aren’t very reliable, especially in the face of dramatic economic, cultural, and political changes. Still, the tendency of some populations throughout the globe and especially in Europe to reproduce at less than replacement levels seems likely to have massive and generally undesirable effects. Secularism, feminism, self-indulgence, and prosperity tend to lower birthrates. Are they—and, therefore, the Alexandrian stage of civilization—thereby, past a certain point, self-limiting or even self-destructive?