Japan is facing such swift demographic collapse, Eberstadt’s essay suggests, because its culture combines liberalism and traditionalism in particularly disastrous ways. On the one hand, the old sexual culture, oriented around arranged marriage and family obligation, has largely collapsed. Japan is one of the world’s least religious nations, the marriage rate has plunged and the divorce rate is higher than in Northern Europe.

Yet the traditional stigma around out-of-wedlock childbearing endures, which means that unmarried Japanese are more likely to embrace “voluntary childlessness” than the unwed parenting that’s becoming an American norm. And the traditional Japanese suspicion of immigration (another possible source for demographic vitality) has endured into the 21st century as well. Eberstadt notes that “in 2009 Japan naturalized barely a third as many new citizens as Switzerland, a country with a population only 6 percent the size of Japan’s and a reputation of its own for standoffishness.”…

There is one modern world, but every civilization takes a different route through it. For all our problems, 21st-century Americans should be thankful that we aren’t headed toward the same sunset as Japan.