Long-Run GDP per Capita
For most of recorded history GDP per capita barely grew at all. The estimated world average in 1000 AD was $467 (in 2011 dollars). In 1820 it was $1,102. In 2020 it was $15,200. Almost everything that has shifted human material conditions happened in the past 200 years — and the gains were extremely uneven by region.
Key insights
Pre-industrial economies grew imperceptibly
The Maddison series puts annual per-capita growth from 1 AD to 1500 at roughly 0.01% — population growth absorbed almost all productivity gains. Western Europe pulled slightly ahead from about 1500 onwards. The decisive break came after 1820, when British and then continental European GDP per capita started growing at sustained 1%+ annual rates.
Divergence preceded convergence
From 1820 to 1950 the gap between rich and poor countries widened steadily — the Industrial Revolution arrived in some places and not others. From 1950 onwards, parts of the developing world began to catch up (Japan, Korea, Taiwan, then China). The 'great convergence' is an artefact of about half the world's population; another quarter remains essentially flat.
The 'hockey stick' is real
Plotted from 1 AD to 2020, GDP per capita is indistinguishable from zero until ~1750. By 2020 the world average is roughly 30× the 1820 level; the US figure is roughly 25× its 1820 figure; the UK figure is roughly 15× its 1820 figure. South Korea grew from $854 (1820) to $42,000 (2020) — a 49× increase, the most dramatic in the dataset.
GDP per capita 1500–2020 — selected regions
GK$ 2011 prices, log scale appropriate
Key Finding: Western Europe and the US accelerate after 1820; Asia largely flat until 1960, then explosive in East Asia.
World GDP per capita 1 AD – 2020
GK$ 2011 prices, world average
Key Finding: Essentially flat for 1,800 years, then explosive growth after the Industrial Revolution.
Methodology & caveats
Maddison Project methodology
The Maddison Project (now hosted at Groningen) combines national accounts (where they exist), historical price reconstructions, agricultural output proxies, and PPP benchmarks. Estimates back to 1820 are reasonably firm for developed countries; estimates for 1 AD–1500 are based on archaeological and tax records and carry wide uncertainty bands.
PPP vs nominal
Long-run comparisons use Geary-Khamis dollars at 2011 prices — PPP-adjusted figures that account for cost-of-living differences across time and place. Using market exchange rates would make the recent past look very different and the deep past nonsensical (most goods were not internationally traded).
What 'GDP per capita' meant in 1500
Most pre-industrial output was subsistence agriculture not exchanged in markets. Historical national accounts impute values for non-monetary production. The reconstructions are good enough for orders of magnitude and broad regional comparisons; they are not precise.