Power structures through history
Who actually held power, when, and how much of it? This map lays out the major power structures of the last 2,500 years — Achaemenid Persia, Rome, the Han, the Byzantine Empire, the Abbasid Caliphate, the Mongols, the Ottomans, the Mughals, the British Empire, the USSR, and today's superpowers — each as a band through time. The band's thickness is the power's relative strength; switch the metric to see strength as the number of people under its rule, its share of world GDP, or its military might.
Data table — peak values per power
| Power | Era | Region | Peak people under rule | Peak GDP share | Peak military index |
|---|---|---|---|---|---|
| Achaemenid Persia | 550–330 BCE | Middle East & Islamic world | 35M (500 BCE) | ~25% (500 BCE) | 95 (500 BCE) |
| Rome (Republic & Empire) | 509 BCE – 476 CE | Europe & the Atlantic West | 62M (200) | ~30% (100) | 95 (100) |
| Maurya Empire | 322–185 BCE | South Asia | 52M (250 BCE) | ~32% (250 BCE) | 85 (300 BCE) |
| Han dynasty | 206 BCE – 220 CE | East Asia | 58M (1) | ~26% (100 BCE) | 85 (100 BCE) |
| Byzantine Empire | 330–1453 | Europe & the Atlantic West | 30M (550) | ~14% (550) | 70 (550) |
| Tang dynasty | 618–907 | East Asia | 60M (750) | ~30% (750) | 90 (650) |
| Abbasid Caliphate | 750–1258 | Middle East & Islamic world | 40M (800) | ~22% (800) | 85 (800) |
| Song dynasty | 960–1279 | East Asia | 100M (1100) | ~30% (1100) | 60 (1000) |
| Mongol Empire | 1206–1368 | Steppe & Eurasia | 110M (1300) | ~29% (1300) | 100 (1250) |
| Ottoman Empire | 1299–1922 | Middle East & Islamic world | 30M (1600) | ~9% (1600) | 85 (1520) |
| Ming dynasty | 1368–1644 | East Asia | 150M (1600) | ~29% (1600) | 85 (1420) |
| Spanish Empire | 1492–1898 | Europe & the Atlantic West | 31M (1800) | ~10% (1600) | 85 (1550) |
| Mughal Empire | 1526–1857 | South Asia | 158M (1700) | ~24% (1650) | 80 (1600) |
| British Empire | 1583–1997 | Europe & the Atlantic West | 500M (1938) | ~24% (1900) | 95 (1850) |
| Qing dynasty | 1644–1912 | East Asia | 430M (1850) | ~33% (1800) | 80 (1700) |
| Russian Empire / USSR | 1721–1991 | Steppe & Eurasia | 290M (1991) | ~10% (1950) | 95 (1975) |
| United States | 1776– | Europe & the Atlantic West | 340M (2025) | ~35% (1945) | 100 (1945) |
| People's Republic of China | 1949– | East Asia | 1.41B (2025) | ~17% (2025) | 85 (2025) |
Informed estimates, not precise figures. Population under rule follows McEvedy & Jones-style reconstructions; GDP shares follow Maddison-style estimates and are very rough before 1500; the military index is a deliberately subjective 0–100 rating of capacity to project force relative to contemporaries. All bands share one scale per metric, so heights are comparable across powers and centuries. The time axis compresses earlier eras (see the tick marks).
How to read it
Each row is one power structure, ordered by when it emerged; its band runs from rise to fall, and all bands share a single scale per metric, so a thick band in 100 CE and a thick band in 1900 mean comparable relative weight in their worlds. Colors group powers by region — Europe and the Atlantic West, the Middle East and Islamic world, East Asia, South Asia, and the Eurasian steppe.
Three patterns stand out. First, for most of recorded history the heavyweights were Asian: from the Han to the Qing, a Chinese dynasty is almost always among the largest bands, and Mughal India's economy rivaled all of Europe combined into the 1700s. Second, the three metrics disagree — and the disagreement is the story. The Mongols were militarily overwhelming long before they governed many people; Song China was an economic giant with a mediocre army and paid for it; the late Qing still ruled a third of humanity while its GDP share and military weight collapsed. Third, hegemony is brief. On these bands, no power holds the top position on all three metrics for much more than a century — Rome at its height, Britain in the nineteenth century, the United States after 1945.
Caveats
Everything here is an informed estimate, and the further back, the rougher it gets. Population under rule is the best-attested of the three; GDP shares before 1500 are heroic extrapolations in the Maddison tradition; and "military might" is an explicitly subjective index — there is no defensible single number for the war-making capacity of the Abbasid Caliphate, only a judgment relative to its contemporaries. Borders, vassalage and tribute also blur who was "under the rule" of whom (the Mongol numbers count the whole empire before its division into khanates). Treat the map as a way to see shapes and compare orders of magnitude, not as a dataset. It pairs well with Forms of rule through history, which slices the same centuries by how people were governed rather than by whom.