But the economic consequences of the childless city go deeper. For example, the high cost of urban living may be discouraging some couples from having as many children as they’d prefer. That would mean American cities aren’t just expelling school-age children; they’re actively discouraging them from being born in the first place. In 2018, the U.S. fertility rate fell to its all-time low. Without sustained immigration, the U.S. could shrink for the first time since World World I. Underpopulation would be a profound economic problem—it’s associated with less dynamism and less productivity—and a fiscal catastrophe. The erosion of the working population would threaten one great reward of liberal societies, which is a tax-funded welfare and eldercare state to protect individuals from illness, age, and bad luck…
Finally, childless cities exacerbate the rural-urban conundrum that has come to define American politics. With its rich blue cities and red rural plains, the U.S. has an economy biased toward high-density areas but an electoral system biased toward low-density areas. The discrepancy has the trappings of a constitutional crisis. The richest cities have become magnets for redundant masses of young rich liberals, making them electorally impotent. Hillary Clinton won Brooklyn by 461,000 votes, about seven times the margin by which she lost Pennsylvania, Michigan, and Wisconsin combined. Meanwhile, rural voters draw indignant power from their perceived economic weakness. Trump won with majority support in areas that produce just one-third of GDP by showering hate and vitriol on cities that attract immigration and capital…
For those young and middle-aged Americans who are having sex and having children, the smaller cities and suburbs might simply be a better place to live—and not just for the obvious reason that they’re more cost-friendly for the non-rich. Perhaps parents are clustering in suburbs today for the same reason that companies cluster in rich cities: Doing so is more efficient. Suburbs have more “schools, parks, stroller-friendly areas, restaurants with high chairs, babysitters, [and] large parking spaces for SUV’s,” wrote Conor Sen, an investor and columnist for Bloomberg. It’s akin to a division of labor: America’s rich cities specialize in the young, rich, and childless; America’s suburbs specialize in parents. The childless city may be inescapable.