With fertility hovering around 1.6 children per woman—well below the roughly 2.1 needed to replace a generation—the U.S. can either import workers, redesign institutions for smaller cohorts, or do both. Choosing neither will be the most expensive option.
For years, America has treated falling birth rates as an academic concern—fodder for demographers and anxious op-eds. But fertility is not a mood; it’s an input. When it stays low for long enough, it rewrites the numbers that keep colleges solvent, churches staffed, and labor markets functioning. The U.S. total fertility rate has drifted to roughly 1.6, far below the 2.1 level associated with long-run population replacement.
Historically, the United States has cushioned low fertility with immigration. In the Census Bureau’s recent estimates, net international migration rose sharply—about 1.7 million in 2022, 2.3 million in 2023, and 2.8 million between 2023 and 2024—accounting for the overwhelming share of the country’s population growth in that period. Those figures underscore the policy reality: if immigration is pulled down for political reasons, administrative bottlenecks, or enforcement changes, the adjustment doesn’t disappear. It relocates—from the border debate into campus budgets, parish balance sheets, and the price of everyday services.
In the short run, the country can feel unchanged—crowded highways, tight housing markets, packed pediatric offices in fast-growing metro areas. Demography is slow motion. The shift becomes visible when a smaller cohort reaches an institution that was built for a bigger one. That is why the combined pressure of fewer births and fewer newcomers will show up first in places with fixed costs and thin margins: tuition-dependent colleges, donation-funded congregations, and labor-intensive sectors that can’t be automated on a schedule Congress can vote on.
The demographic squeeze is often discussed as “aging,” which sounds like a gentle inevitability. But what matters for institutions is the ratio: how many working-age adults exist to support the young and the old. Lower fertility narrows the base of that pyramid; lower immigration removes a key way the U.S. has historically widened it. The result is a country with less slack—fewer spare students to keep a marginal college open, fewer spare volunteers to keep the church calendar full, fewer spare workers to keep prices steady in health care, construction, and food.
The consequences will be easiest to see in institutions that were designed, implicitly, for a growing country. Colleges built residence halls and hired staff in an era when each graduating class could be assumed to be a little larger than the last. Churches expanded youth ministries on the expectation that families would keep having children—and keep showing up. And the economy, for all its talk of innovation, still depends on an unglamorous abundance: enough workers to pour concrete, drive trucks, care for the elderly, and keep small towns functioning. When the underlying numbers change, these places don’t simply “adjust.” They develop symptoms.
The Colleges That Won’t Be Able to Out-Recruit the Math
Higher education is where demography becomes immediately legible. When a town loses a factory, it can cling to the hope that another employer will move in. When a region loses 18-year-olds, there is no equivalent rescue. You can’t recruit students who were never born.
Demographers and admissions officers have a name for the coming squeeze: the enrollment cliff, the point at which the size of the traditional college-age population begins to drop for years. In many projections, the fall is steepest in the Northeast and Midwest, where aging is already advanced and out-migration has been the quiet background story for decades. The most prestigious universities will still fill their classes; scarcity tends to consolidate power. The vulnerability is concentrated among tuition-dependent regional private colleges, small liberal-arts schools without large endowments, and public systems that serve places where the young have been leaving since before the phrase “brain drain” became a cliché.
One widely cited set of projections, from the Western Interstate Commission for Higher Education, puts a concrete figure on the coming contraction: the U.S. is expected to hit a modern high-water mark of about 3.9 million high school graduates in 2025, followed by a long decline. By 2041, the graduating class is projected to be roughly 3.4 million—about a 13% drop. The metaphor of a cliff is melodramatic in one sense; the decline is gradual. But for campuses that run close to break-even, “gradual” is not the same as “manageable.”
Colleges have been practicing for this moment: chasing out-of-state students, discounting tuition more aggressively, and promising a clearer return on investment. Many will lean harder on adult learners, certificate programs, and online degrees. But lower immigration takes away one of the sector’s most reliable release valves. International students have become a financial pillar for many campuses, and in some fields they also help staff labs and graduate programs. When student-visa policy tightens, when processing slows, or when post-graduation work pathways narrow, universities don’t just lose tuition. They lose a talent pipeline. The politics of immigration, in other words, now reaches directly into the registrar’s office.
In the next decade, the college map is likely to redraw itself through mergers, program eliminations, and quiet closures—the kind announced with soothing language about “strategic realignment.” The losses won’t be merely academic. In many towns, a small college is a de facto civic institution: it employs locals, draws visitors for sports and performances, and supplies nurses, teachers, and technicians. When it shrinks or disappears, the region loses a piece of its self-renewal. The demographic squeeze doesn’t just reduce enrollment. It reduces the density of public life.
Churches and the Slow Leak of Generational Replacement
Survey data helps clarify what “decline” looks like in practice. In Pew Research Center’s 2023–24 Religious Landscape Study, 25% of U.S. adults say they attend religious services in person at least once a week, and about 40% say they participate at least monthly when in-person and online attendance are considered together. That is a lot of Americans—and also a smaller base than many congregations were built for, especially in regions where populations are aging and families are smaller.
If colleges feel demographic change as a sudden cliff, churches often experience it as a slow leak. Membership rolls and Sunday attendance are already under pressure from secularization, cultural sorting, and the simple fact that younger Americans are less likely to join institutions of any kind. But fertility decline adds a second, quieter force: fewer children coming through the nursery, fewer teenagers cycling through youth group, fewer young couples becoming the backbone of a congregation’s volunteer life.
A congregation’s finances are a story about age. Older members, who often own homes and have paid off major debts, tend to give more steadily. Younger families bring energy, but they also bring expenses—childcare, programming, pastoral attention. When the age pyramid inverts, churches can appear stable right up until the moment they aren’t. A building still needs a roof. A pastor still needs a salary. The organ still needs repairs, even if the choir has dwindled from forty people to twelve.
In many parts of the country, immigration has been one of the few counterweights to religious decline—revitalizing Catholic parishes, expanding Pentecostal and evangelical congregations, and sustaining an ecosystem of storefront churches and community-based ministries. Fewer newcomers means fewer built-in networks that form around shared language, shared origin, and shared need. And because immigrants are disproportionately likely to arrive during their working and childbearing years, they don’t just add warm bodies to pews; they add the demographic shape that institutions require. Without that inflow, consolidation accelerates: shared clergy across multiple parishes, merged congregations, sold properties, and a shift from expansion to maintenance.
When a church closes, the loss is not only theological. Churches are among the country’s most durable forms of social infrastructure: they host food pantries, recovery groups, childcare co-ops, voting drives, and a thousand unrecorded acts of neighborly care. A demographically thinned America will not simply attend fewer services. It will also have fewer places where people learn, in practice, how to belong to one another.
An Economy Built on Abundance, Entering an Era of Constraint
Here is the baseline many debates glide past: immigrants are not a niche workforce. According to the Bureau of Labor Statistics, the foreign-born accounted for about 19.2% of the U.S. civilian labor force in 2024. That matters because immigrants are disproportionately concentrated in prime working ages and in occupations where shortages show up quickly. If overall immigration slows, it is not merely a change in the country’s cultural mix. It is a direct change in labor supply.
Economists like to argue about productivity, interest rates, and innovation. But beneath the arguments is a simpler truth: Growth is easier when you have more people. A rising population increases demand for housing and services; it also increases the supply of workers to meet that demand. When the working-age share of the population shrinks, the economy must perform a kind of demographic gymnastics—asking fewer workers to produce more, to care for more retirees, and to fund more public obligations.
The first and most obvious symptom is a tighter labor market that never fully relaxes. Not every shortage makes headlines. Some appear as slower construction timelines, fewer open restaurant hours, longer waits for home repairs, and hospitals that can’t staff beds. In a world of slower labor-force growth, wage gains may rise for some workers—but they can also show up as higher prices in sectors where labor is the main input. In other words: service inflation as a way of life.
For decades, immigration has functioned as a pressure valve, adding people in their prime working years and replenishing occupations that struggle to attract native-born workers at prevailing wages. If that valve narrows, the pinch will be felt most in the labor-intensive parts of the economy—the places where work is physical, hours are irregular, and margins are thin. Construction is the clearest case. Housing researchers at the National Association of Home Builders estimate that foreign-born workers made up about 26% of the overall construction labor force in 2024, and the share is higher still in some trades—drywall, roofing, plaster and stucco—where immigrant crews can represent roughly half the workforce. Agriculture and food processing depend on immigrant labor in similarly structural ways. And leisure and hospitality—restaurants, hotels, cleaning staffs—pull from the same labor pool, meaning shortages can cascade across sectors that compete for the same workers.
The care economy makes the demographic problem self-reinforcing. As Americans have fewer children, the country ages faster; as the country ages, demand for caregivers rises; as demand rises, labor shortages become harder to solve. A 2025 analysis from KFF, using 2023 Census survey data, found immigrants make up about 28% of the direct care workforce providing long-term care—more than 820,000 workers—and about 32% of home-care workers. If immigration slows across the board, the shortage doesn’t remain an inconvenience. It becomes a constraint on how families live—whether adult children can work full-time, whether elders can remain at home, and whether communities can keep enough staff to deliver basic care.
A thinner workforce also collides with the country’s promises. Social Security and Medicare are, at heart, intergenerational compacts: today’s workers support yesterday’s. When there are fewer workers per retiree, the trade-offs become sharper—higher taxes, reduced benefits, later retirement, or some combination. Meanwhile, slower population growth may ease some pressures, such as demand for new housing, but it can also make the politics of building even more perverse. Regions that are still growing will compete harder for workers and will struggle to expand supply fast enough; regions that are shrinking will find it difficult to maintain the infrastructure they already have.
The Quiet Cascade—and the Choices That Remain
It is tempting to treat fertility decline as a cultural story—about dating apps, housing costs, or the fraying of confidence in the future—and immigration as a separate political story, about borders and belonging. Policy is what connects them. In the coming years, a smaller generation will move through the country’s institutions like water through a narrowing pipe. Colleges will compete over a dwindling pool of students and, in some places, collapse into fewer and larger survivors. Churches will discover that the absence of children is not just a spiritual concern but an operational one. And the economy will learn what it means to run without a spare workforce, especially in the hands-on sectors that keep daily life functioning.
A policy-forward response starts with admitting trade-offs. On births, the evidence from other countries suggests that one-time “baby bonuses” rarely transform fertility on their own; the more durable levers are the expensive, boring ones—more housing where jobs are, cheaper childcare, predictable health coverage, and work rules that don’t make having a second child feel like an economic cliff. On immigration, the question is not whether the country can do without newcomers, but which institutions will pay if it tries: universities that rely on international students, builders that can’t staff job sites, families that can’t find home-care aides. That points toward a menu of options—clearing visa backlogs, modernizing legal pathways for high-need work, protecting predictable routes for students and high-skill graduates, and matching immigration levels to the labor demand created by an aging society. The demographic squeeze is coming either way. The policy choice is whether it arrives as managed adaptation or as institutional whiplash.
Dr. Beaux Bonhoeffer
Find me also @beauxbonhoeffer.bsky.social and at beauxbonhoeffer.substack.com