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Expand chart
Data: Pew Research Center; Chart: Axios Visuals

Robust immigration has buoyed the populations of the U.S., U.K. and other developed nations, keeping them from shrinking for now. But a number of aging countries don't have enough immigration to replace their population as their fertility rates continue to plummet.

The bottom line: The control of borders is a serious political problem, but experts are eyeing legal immigration as one solution to a future demographics challenge. As nations age, many will be short of workers to support social programs relied on by the older population.

Yes, but: "Immigration is no silver bullet by itself: it can slow an aging population, but it would be impossible to reverse it with current or even slightly higher immigration numbers in most countries," says Irene Bloemraad, sociology professor and director of University of California Berkeley's Interdisciplinary Migration Initiative.

  • If the expected number of children per woman of childbearing age drops in the U.S. from 1.76 to 1.5 or 1 — well below the replacement rate of 2.1 — no amount of immigration can compensate, Richard Jackson, president of the Global Aging Institute, tells Axios.

Be smart: Demographers report a link between falling fertility rates and the incidence of populism, which in many countries has coincided with strong anti-migrant resistance.

A closer look by country:

  • The U.S.: The proportion of immigrants recently reached a more-than-100-year high. The Trump administration, however, has made it harder for high-skilled workers to get visas and proposed stricter penalties for student visa overstays, in addition to the hardline measures it has taken against undocumented immigrants.
  • Japan: Immigrants make up only 2% of the population, with fertility rates declining and immigration highly unpopular. Its foreign-born population has grown by 40% just since 2013, according to the Migration Policy Institute. But that's still far from the 10% share of the population needed to halt shrinkage.
  • Germany has a similar fertility rate to the U.S. The country has seen a surge of Syrian immigrants, but anti-migrant politics have followed, threatening Chancellor Angela Merkel's hold on power.
  • In China, population growth and fertility rates have fallen significantly since the 1980s — in large part due to its birth limits, which has left the country with an aging population, a shortage of working-age citizens, and millions more men than women. China is now considering ending its birth limits and seeking to attract some high-talent immigrants, the New York Times reported.

What to watch: Mass immigration to developed nations with aging populations would have global economic, social and political impact. The effects would be felt by countries immigrants are leaving in the form of lost human capital, and by those in which they're arriving, with both economic benefits and possible social discord.

Go deeper

The E-commerce shopping spree

Illustration: Aïda Amer/Axios

Retailers have gotten really good at selling stuff online. So much so, investors want them to separate from the business units that do just that.

Why it matters: Spinning off these crown jewels may jeopardize both the physical and e-commerce sides of the companies in the long run by breaking the benefits of hybrid operations, analysts say.

1 hour ago - World

U.S. envoy to visit Sudan as "most dangerous" crisis intensifies

The sit-in in Khartoum. Photo: Mahmoud Hjaj/Anadolu Agency via Getty

U.S. envoy for the Horn of Africa Jeffrey Feltman will visit Khartoum this week amid what Prime Minister Abdalla Hamdok has called the “worst and most dangerous" crisis of Sudan’s transition to democracy, two sources with direct knowledge tell Axios.

Driving the news: Roughly 2,000-3,000 people had joined a sit-in in Khartoum as of this afternoon, per Reuters, after protesters massed over the weekend to call on the military to bring down the government. The protests came just four weeks after a failed military coup.

Trump sues National Archives, Jan. 6 committee to block records request

Photo: Chip Somodevilla/Getty Images

President Trump filed a lawsuit Monday seeking to block the National Archives from releasing White House records to the House select committee investigating the Jan. 6 Capitol insurrection, citing executive privilege.

Why it matters: It's the latest escalation in Trump's campaign to disrupt the committee's sweeping probe into the circumstances surrounding Jan. 6, including his actions and communications leading up to the Capitol attack.