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No, Prosperity Doesn’t Cause Population Collapse

Blog Post | Population Growth

No, Prosperity Doesn’t Cause Population Collapse

Wealth doesn’t have to mean demographic decline.

Summary: For decades, experts assumed that rising prosperity inevitably led to falling birth rates, fueling concerns about population collapse in wealthy societies. But new data show that this link is weakening or even reversing, with many high-income countries now seeing higher fertility than some middle-income nations. As research reveals that wealth and fertility can rise together, policymakers have an opportunity to rethink outdated assumptions about tradeoffs between prosperity and demographic decline.


For years, it was treated as a demographic law: as countries grow wealthier, they have fewer children. Prosperity, it was believed, inevitably drove birth rates down. This assumption shaped countless forecasts about the future of the global population.

And in many wealthy countries, such as South Korea and Italy, very low fertility rates persist. But a growing body of research is challenging the idea that rising prosperity always suppresses fertility.

University of Pennsylvania economist Jesús Fernández-Villaverde recently observed that middle-income countries are now experiencing lower total fertility rates than many advanced economies ever have. His latest work shows that Thailand and Colombia each have fertility rates around 1.0 births per woman, which is even lower than rates in well-known low-fertility advanced economies such as Japan, Spain and Italy.

“My conjecture is that by 2060 or so, we might see rich economies as a group with higher [total fertility rates] than emerging economies,” Fernández-Villaverde predicts.

This changing relationship between prosperity and fertility is already apparent in Europe. For many years, wealthier European countries tended to have lower birth rates than poorer ones. That pattern weakened around 2017, and by 2021 it had flipped.

This change fits a broader historical pattern. Before the Industrial Revolution, wealthier families generally had more children. The idea that prosperity leads to smaller families is a modern development. Now, in many advanced economies, that trend is weakening or reversing. The way that prosperity influences fertility is changing yet again. Wealth and family size are no longer pulling in opposite directions.

This shift also calls into question long-standing assumptions about women’s income and fertility. For years, many economists thought that higher salaries discouraged women from having children by raising the opportunity cost of taking time off work. That no longer seems to hold in many countries.

In several high-income nations, rising female earnings are now associated with higher fertility. Studies in Italy and the Netherlands show that couples where both partners earn well are more likely to have children, while low-income couples are the least likely to do so. Similar findings have emerged from Sweden as well. In Norway, too, higher-earning women now tend to have more babies.

This trend is not limited to Europe. In the United States, richer families are also beginning to have more babies than poorer ones, reversing patterns observed in previous decades. A study of seven countries — including the United States, the United Kingdom, Germany and Australia — found that in every case, higher incomes for both men and women increased the chances of having a child.

This growing body of evidence challenges the assumption that prosperity causes people to have fewer children. 

Still, birth rates are falling across much of the world, with many countries now below replacement level. While this trend raises serious concerns, such as the risk of an aging and less innovative population and widening gaps in public pension solvency, it is heartening that it is not driven by prosperity itself. Wealth does not automatically lead to fewer children, and theories blaming consumerism or rising living standards no longer hold up.

Although the recent shift in the relationship between prosperity and fertility is welcome, it is not yet enough to raise fertility to the replacement rate of around 2.1 children per woman — a challenging threshold to reach.

But the growing number of policymakers around the world concerned about falling fertility can consider many simple, freedom-enhancing reforms that lower barriers to raising a family, including reforms to education, housing and childcare. Still, it’s important to challenge the common assumption that prosperity inevitably leads to lower birth rates: Wealth does not always mean fewer children.

This article was published at The Hill on 6/16/2025.

Blog Post | Economic Growth

The Myth of American Decline | Podcast Highlights

Chelsea Follett interviews Michael Strain about how populism could kill the American dream.

Listen to the podcast or read the full transcript here.

Joining me today is economist Michael Strain, Director of Economic Policy Studies at the American Enterprise Institute and a professor at Georgetown University’s School of Public Policy. He is the author of The American Dream Is Not Dead: But Populism Could Kill It and co-author of “Have You Heard the Good News?” an essay in The Free Press that will be the main subject of our discussion. Michael, how are you?

I am well. Thanks for having me.

Let’s walk through this piece. You say that “yes, we have real problems, but widen the aperture, and you’ll see that there has never been a better time to be alive.” Tell me about that.

I think that is self-evidently true. It’s true whether you look at economic outcomes or broader measures of quality of life. But it’s a very controversial statement. Opinion leaders, commentators, and politicians from both parties seem to agree that things are very bad and were much better in the past.

You say all this doomsaying feeds into the populist moment we are living in, and it comes from both sides. Are we living in a populist moment?

I do think we’re living in a populist moment.

There’s always been a populist strain in American politics, but it was amplified by the 2008 crisis. Pat Buchanan’s message from his 1990s presidential campaigns and Donald Trump’s message from 2016 are very similar. Bernie Sanders’ message from the 1990s was very similar to his 2016 campaign. The financial crisis exacerbated this populist impulse: the share of the GOP primary electorate that voted for Buchanan in the run-up to Super Tuesday was around 25 percent; for Trump in 2016, it was around a third.

The financial crisis was global, and in fact we’ve seen a rise of populist politics globally—across Western Europe and the United Kingdom, for instance—that’s quite similar to what’s been happening here at home. My sense is that populist sentiment was reverting to its baseline by 2019, but then the pandemic stirred up a lot of populist sentiment. One characteristic of populism is that it pits the people against the elites, and the elites made a lot of mistakes during the pandemic, such as keeping kids out of school and faulty public health guidance. That exacerbated the populist sentiment.

Tell me about horseshoe theory and the parallels you see between a figure like Zohran Mamdani on the left and a figure like Josh Hawley on the right.

Horseshoe theory is the idea that in a two-party system like ours, the far left and the far right tend to more closely resemble each other the further you go toward the extremes. You see it in support for specific policies: both the far left and the far right are more supportive of organized labor than the center left and center right. They are more supportive of using the tax code to penalize certain corporations or industries. But you also see convergence on a deeper level, where the far left and far right are both less supportive of the US Constitution and our Madisonian system than the center left and center right.

I think now is a good time to ask you what exactly you mean by populism, because people use that word in different ways.

I think of populism as characterized by three big things. The first is pitting the people against the elite. The second is a turn inward: the idea that the US should be economically self-sufficient, that globalization and international trade are bad, and that the US should be very skeptical of immigration and isolationist in foreign policy. The third is a deep pessimism about the current state of the country and prospects for the future.

That populist mentality gives rise to zero-sum grievance; the idea that for me to do better, you have to do worse. For the people to do better, the elites have to be made worse off. For native-born workers to do better, there have to be fewer immigrant workers.

The left and right define “elites” differently, with some overlap. Who are the elites being defined as the enemy by the populists on the right and the left?

Both left-wing and right-wing populists are skeptical of big business, rich people broadly defined, and the media. One important difference is that right-wing populists direct a lot of hostility toward immigrants in a way that left-wing populists don’t. They wouldn’t say immigrants are part of the elite, but they would say the elites are encouraging and allowing large immigrant inflows, which is bad for native-born Americans.

The narrative on both sides is that our economic system, and the political system that supports it, has been fundamentally broken for decades. That system exists to serve the interests of the elites, and, because society is zero-sum under their view, if the elites are doing better, the people are doing worse.

There’s disagreement among populists on the right and left about what needs to be done to fix the system, but they agree that whatever replaces it should be much more intrusive. They agree that market outcomes should be altered much more substantially and that economic liberty should be much more curtailed.

So according to this narrative, life in the United States today is terrible, and we need to burn down the system. But you write that there has never been a better time and place to be alive than in the United States today. Lay out the facts for me.

That’s self-evident from the data, especially if you focus on economic outcomes.

Over the last three decades, inflation-adjusted wages for typical workers have increased by 44 percent. Inflation-adjusted household incomes are way up as well. The wealth of the typical household, after adjusting for inflation, has more than doubled over the last three decades. Consumption is at an all-time high as well.

We should care more about the poor than we care about the rich, but if you look at low-income Americans, the bottom 20 percent or bottom third, their outcomes over the past several decades have improved faster than outcomes at the median. So, the evidence is very strong that from an economic perspective, there’s really never been a better time to be alive.

What about inequality?

There’s no question that inequality is a lot higher today than it was in the ‘70s, but most of that growth happened in the ‘80s and ‘90s. My reading of the evidence is that over the last 15 years or so, inequality has either stagnated or declined. Wage inequality has been declining in recent years, and I’m comfortable asserting that we’ve seen a reduction in income inequality over the last decade or two.

I would add that people overstate the importance of inequality. Inequality growth was really rapid in the ‘80s and ‘90s, but people didn’t care about it because average wages were growing quickly, just not as quickly as incomes at the top. Inequality was falling in the decade after the financial crisis, but people were much more concerned about it because the 2008 financial crisis and the Great Recession were such traumatic events. So, I don’t think inequality is really what people are reacting to.

You also discuss non-economic measures of well-being, such as crime and life expectancy. Tell me about some of those.

The story is much the same when you look at broader outcomes. The rate of violent crime has fallen dramatically in the past three decades. Life expectancy dropped in 2020 and 2021, but it’s now once again trending in the right direction. Access to information has obviously never been higher. Leisure time, in terms of paid time away from work, has never been higher. Life in general has also become much safer; you’re much less likely to die of an illness or in a car accident than in previous decades.

Now is actually a particularly strange time to be arguing that our outlook is bleak and life was better decades ago. Think about what artificial intelligence is likely to do for drug discovery, for curing diseases, and for educating kids. We are at the beginning of an age of marvels. We’re likely to see astonishing innovations and improvements in quality of life in the next two decades.

You write that populist leaders actually seem to look down on American workers and households by behaving as if everyday people don’t benefit from material prosperity, low prices, or relatively safe and comfortable jobs.

Can you make that argument comprehensible?

Take the argument that more people should make things with their hands. Many people hear that and think, “Okay, I can kind of get that.” But think about the implications in an economy with a 4 percent unemployment rate. If we’re moving more people into manufacturing, we’re moving people out of services, and service workers earn more on average than manufacturing workers. So, the argument is really that people should move from a higher-wage industry into a lower-wage industry. That may be inconvenient for the populists chasing this vision, but it is just a fact.

There’s an attitude here on the part of populists that it’ll be better for people to work in an industry they have not chosen, that pays lower wages, in a job that’s less physically comfortable or safe than their current job. That strikes me as patronizing and condescending, and antithetical to the way Americans should expect their government to treat them.

How does this piece relate to your book The American Dream Is Not Dead?

The message and arguments are quite similar. The view that the American dream is dead is quite common, with a large focus on the economic components of the American dream, and I don’t see it that way.

You do fear that if enough people believe the dream is dead, they could kill it — that’s the subtitle of your book. How could populism kill the American Dream?

The populist diagnosis of what ails the United States is fundamentally wrong, and the policies that flow from that incorrect diagnosis are going to be harmful. A big trade war or big new social programs or nationalization would be very bad for typical workers and households: wage growth would slow, real wages might even decline, and you’d see a reduction in the rate of innovation and productivity growth. More fundamentally, there’s a real threat to our system of democratic capitalism if the government stops respecting the role that markets play in advancing prosperity and feels generally less constrained about stepping in.

Finally, if you introduce the pervasive belief that the game is rigged, that hard work doesn’t pay off, that typical workers can’t get ahead because the elites are expropriating all the economic gains, you dim people’s aspirations, reduce work effort, and make people less tolerant of risk. You end up creating some of the very problems the populists are incorrectly arguing currently exist.

One thing you do in this book is invite two ideological opponents to provide rebuttals, one from the populist left and one from the populist right, so readers can decide for themselves. One of those arguments is that despite all your data points, there are still real segments of the population who are economically struggling. How would you respond?

There’s no question about that, and we should be focusing our energy on those pockets of problems. If you’re a 50-year-old man who did not graduate high school and has recently been laid off, you’re in a tough spot, and public policy should be doing more to connect you with opportunities.

There have also been time periods of real struggle. 2008 to 2014 or so were bad years for lots of households. My goal is not to be Panglossian. Even when times are good, like they are right now, there are groups of Americans and places in America where things are not going well. But part of the problem of populism is that it doesn’t want to focus our energy on those groups or places. It wants to focus on much larger projects like reordering the global trading system or the American healthcare system, and that’s actually to the detriment of the Americans who are really struggling.

The Human Progress Podcast | Ep. 81

Michael Strain: The Myth of American Decline

Economist Michael Strain argues that populism could kill the American dream.

World Bank | Income & Inequality

Global Progress Lifts Six Nations Into Higher Income Classifications

“Since 1987, the global income classification landscape has changed significantly, with the share of economies classified as low-income declining from 30% to 11%. These shifts have not been evenly distributed, however, with some countries moving across income groups much faster than others. This year’s update to the World Bank Group Country Income Classifications shows six countries moved to a higher income category, but each has a different story to tell: a country emerging from economic crisis, an export powerhouse outpacing its peers, and an economy that turned out to be 10% larger than previously thought are just three of them…

This year, none of the countries assessed moved down. Five moved from lower-middle to upper-middle income: Jordan, Micronesia, the Philippines, Sri Lanka, and Viet Nam. One moved from low to lower-middle income: Togo. They reached the same thresholds through very different paths.”

From World Bank.

Wall Street Journal | Wealth & Poverty

The US Added 1,200 New Millionaires a Day Last Year

“America knows how to manufacture millionaires.

Over 440,000 people—or more than 1,200 a day—became millionaires in the U.S. in 2025, accounting for nearly half of the world’s new millionaires, according to an annual report on global wealth published Tuesday by UBS.

Here are a few highlights from the report:

  • The number of millionaires globally rose in 2025, reaching record levels in every market that UBS tracks.
  • More than 23.6 million Americans are now worth seven figures or more.
  • The fastest-growing segment globally, rising at a 7.3% clip over the past five years, were those with $50 million to $100 million in wealth.”

From Wall Street Journal.