A MERICA, I’M AFRAID TO REPORT, TEETERS on the precipice of inexorable decline. Our once limitless horizon is suddenly contracting, our outlook increasingly grim. Ross Douthat, The New York Times’ preeminent moral handwringer, lives in fear of the “stagnation, loneliness, alienation” our future has in store. The cause for all this doomsaying? Not heat waves, wildfires, floods, or any of the other manifestations of the climate crisis. No, far more concerning for those in the halls of power is the 2020 census, which found that the US population is growing at a slower rate than at any time since the Great Depression. Fifty years ago, fears ran rampant that the “population bomb” announced by biologists Paul and Anne Ehrlich would produce a world without enough space to feed its untold…