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Demographics · Issue 01

The age of fewer children

Global fertility is 2.25 and falling through replacement in the 2030s. The 21st century’s quietest mega-trend is a smaller next generation.

DemographicsUpdated 2026-08-228 min read
  1. 01NigerHighest large-population TFR band6.10
  2. 02DR CongoUN WPP 20246
  3. 03NigeriaAfrica’s demographic engine4.50
  4. 04PakistanStill well above replacement3.30
  5. 05EgyptFalling, still young2.80
  6. 06IndiaAt / just below replacement2
  7. 07United StatesGrowth now mostly migration1.62
  8. 08BrazilBelow replacement1.60
  9. 09FranceHigh for Western Europe1.60
  10. 10United KingdomUN WPP 20241.50
  11. 11GermanyPopulation already peaked1.40
  12. 12JapanHighest TFR in East Asia1.20
  13. 13ItalyDeep below replacement1.20
  14. 14ChinaUN WPP 2024; later prints lower1.01
  15. 15South KoreaLowest in the UN table0.73
Global total fertility rate (UN WPP 2024)
2.25
Projected peak, mid-2080s
10.3 bn
Countries whose population has already peaked
63
South Korea TFR, UN WPP 2024
0.73

The peak is later. The inversion is now.

The UN’s 2024 revision still has the human population climbing from 8.2 billion today to about 10.3 billion in the mid-2080s, then easing. That headline is a lullaby. More than half of countries are already below replacement. Sixty-three countries, about 28% of humanity, have already peaked — including China, Japan, Germany, Italy, South Korea, Russia, Spain and Thailand. Global TFR is 2.25, one child fewer than a generation ago, and is projected to cross 2.1 in the 2030s. After that, world population growth is momentum from a young Africa, not a global desire for larger families.

East Asia is the leading indicator, not a curiosity

South Korea’s UN figure of 0.73 is civilisation-scale. China’s 1.01 in the same table is already ‘ultra-low’; subsequent national prints have been lower still. Japan, at about 1.15–1.2, is the most fertile large East Asian society — a sentence that would have been unthinkable in 1990. These are not wartime collapses. They are peacetime, high-income, high-education equilibria. Housing, career sequencing, gender bargaining and the rising cost of status are doing what no five-year plan managed in reverse. Money helps at the margin. It has not, anywhere, restored replacement.

What a smaller next generation does to an economy

First it is a labour-force story: fewer young workers, more 65+, a rising dependency ratio. The UN expects people 65 and older to outnumber children under 18 by 2080. Then it is a capital story: more savings chasing fewer workers, unless automation and migration fill the gap. Then it is a fiscal story: pensions and health as a claim on a thinner tax base. Then it is a geopolitical story: India’s remaining youth bulge, Africa’s, and the relative aging of China and Europe. The 20th century was a race of growing nations. The 21st is a race of aging ones, with a handful of young exceptions.

Investing as if the pyramid flipped

Markets still price many consumer and housing stories as if the 1980s age structure were coming back. It is not. The long view favours productivity tools that substitute for missing workers, healthcare that compresses morbidity, and the few geographies that still have a workforce growing. It is sceptical of business models that need a permanently expanding cohort of first-time buyers in Seoul, Shanghai or Milan.

Investing lens

Horizon 10–30 years · Educational, not advice

Demography is not a quarter. It is a regime. The investable side of fewer children is labour substitution (industrial automation, software, care robotics), later-life health, and the remaining young, reforming economies — India first among large ones. The uninvestable side is assuming 1990s household formation in ultra-low-fertility cities.

Where the map points

  • Industrial automation and warehouse/factory robotics
  • Healthcare systems, devices and drugs aimed at 65+
  • Select Indian and African consumer/financial platforms with a still-growing working-age population
  • Migration-absorbing labour markets (and the housing/education that serves them)

What can break it

  • Pronatal policy and migration swings can change national paths without changing the global one
  • Aging can mean stagnation and populism rather than a clean ‘silver economy’ boom
  • India’s TFR is already at replacement — the youth bulge is a window, not a permanent state

CHART does not recommend securities, funds or trades. Figures can be revised by their publishers. Do your own research and consider regulated advice before allocating capital.

Sources

Every headline number traces to a named publisher. Contextual sources inform the essay, not the key stat.

  1. 01PrimaryUnited Nations Population Division2024-07
    World Population Prospects 2024

    Peak ~10.3 billion in the mid-2080s. Global TFR 2.25; China 1.01; more than half of countries below replacement.

  2. 02CorroboratedUnited Nations2024
    Global Issues: Population

    Life expectancy 73.3 years in 2024; 65+ outnumber children under 18 by 2080.

Keep reading

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~7%

India calendar-year growth, 2026 (IMF)

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The rearmament decade

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$2.89 tn

World military expenditure, 2025

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The $348 trillion ledger

Private and public debt set a record in 2025. Sovereign debt is heading back to 100% of world GDP — earlier than the IMF thought.

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101 graphics in this issue