While the focus here is on the United States as a whole, this is also worth considering at the community level:

A country grows or shrinks in three ways: immigration, deaths, and births. America’s declining fertility rate often gets the headline treatment. Journalists are obsessed with the question of why Americans aren’t having more babies. And because I’m a journalist, be assured that we’ll do the baby thing in a moment. But it’s the other two factors—death and immigration—that are overwhelmingly responsible for the collapse in U.S. population growth…

As recently as 2016, net immigration to the United States exceeded 1 million people. But immigration has since collapsed by about 75 percent, falling below 250,000 last year. Immigration fell by more than half in almost all of the hot spots for foreign-born migrants, including New York, Miami, Los Angeles, and San Francisco…

The implications of permanently slumped population growth are wide-ranging. Shrinking populations produce stagnant economies. Stagnant economies create wonky cultural knock-on effects, like a zero-sum mentality that ironically makes it harder to pursue pro-growth policies. (For example, people in slow-growth regions might be fearful of immigrants because they seem to represent a threat to scarce business opportunities, even though immigration represents these places’ best chance to grow their population and economy.) The sector-by-sector implications of declining population would also get very wonky very fast. Higher education is already fighting for its life in the age of remote school and rising tuition costs. Imagine what happens if, following the historically large Millennial cohort, every subsequent U.S. generation gets smaller and smaller until the end of time, slowly starving many colleges of the revenue they’ve come to expect.

Even if you’re of the dubious opinion that the U.S. would be better off with a smaller population, American demographic policy is bad for Americans who are alive right now. We are a nation where families have fewer kids than they want; where Americans die of violence, drugs, accidents, and illness at higher rates than similarly rich countries; and where geniuses who want to found new job-creating companies are forced to do so in other countries, which get all the benefits of higher productivity, higher tax revenue, and better jobs.

This matters for communities and cities in at least a few ways:

1. The “growth is good” model in the United States assumes continued population growth. This is good for status as well as for other things (see #2).
2. When populations are growing, the incoming revenues help pay for existing infrastructure and services as well as suggest money will be there in the future. In contrast, stagnant or declining populations can require cuts or reductions.
3. The role of immigration cannot be understated and it affects population as well as demographics and local economics. For example, Chicago would have likely had more population loss over recent decades without immigrants coming to the city.

It will be particularly interesting to see what happens if more major population centers experience relatively little or no population growth while a few continue to grow rapidly. Does this change the balance of power and status among places?