There is no definitive, apples-to-apples ranking of the richest people in history. A frequently cited list published by Money in 2015 places Mansa Musa first, but it combines private fortunes with estimates of rulers’ economic power over empires and states. Its order is best read as one publication’s historical comparison—not a settled leaderboard of personal net worth.
Money’s 2015 top ten, and what each ranking represents
Money said its ranking was based on interviews with academic economists and historians and described the effort as “rigorous but highly debatable.” The table preserves the order in that article. Its amounts and economic comparisons are Money’s reported estimates, not a common accounting measure.
| Rank | Person | Basis and qualification |
|---|---|---|
| 1 | Mansa Musa, Mali | Money says records are too scarce to assign an accurate figure. It points to Mali’s gold production and Musa’s pilgrimage to Mecca, but does not establish a modern-dollar net worth. |
| 2 | Augustus Caesar, Rome | Money attributes to Stanford historian Ian Morris an estimate that Augustus at one point held wealth equivalent to one-fifth of the Roman Empire’s economy. Money translated that comparison to about $4.6 trillion in 2014 dollars; it is not an audited personal balance sheet. |
| 3 | Emperor Shenzong, Song China | Money cites historian Ronald A. Edwards for the estimate that the Song empire accounted for 25% to 30% of world output at its peak. The figure describes the empire’s economy and the emperor’s position within it, not Shenzong’s personal fortune. |
| 4 | Akbar I, Mughal India | Money estimates that the Mughal empire represented about one-fourth of global output and discusses the ruling class’s ability to extract wealth. This is a measure of imperial economic power, not a clean estimate of Akbar’s individual assets. |
| 5 | Joseph Stalin, USSR | Money reports that the USSR produced roughly 9.5% of global output in 1950. The article acknowledges that this was national wealth, not Stalin’s personal property; the ranking reflects his power to direct state resources. |
| 6 | Andrew Carnegie, United States | Money reports that Carnegie Steel sold for $480 million in 1901. It estimates the sale price at slightly more than 2.1% of U.S. GDP that year, a share it translated to $372 billion in 2014 dollars. |
| 7 | John D. Rockefeller, United States | Based partly on a 1918 federal income-tax return and other estimates, Money puts Rockefeller’s fortune at about $1.5 billion—nearly 2% of U.S. economic output that year. It translated that share to $341 billion in 2014 dollars. |
| 8 | Alan Rufus, England | Money reports that Rufus died with £11,000 and attributes to Philip Beresford and Bill Rubinstein’s The Richest of the Rich an estimate that the estate equaled 7% of England’s GDP at the time. Money translated that share to $194 billion in 2014 dollars. |
| 9 | Bill Gates, United States | Money gives Gates a net worth of $78.9 billion in 2015. That is a figure for the year of the article, not a current estimate. |
| 10 | Genghis Khan, Mongol Empire | Money describes his wealth principally in terms of land and imperial power, while noting that he shared spoils rather than accumulating them as a private fortune. Historian Morris Rossabi is quoted on sharing as central to Khan’s influence. |
Why “richest” is hard to compare across history
The list mixes at least three different ideas: what a person privately owned, how large a fortune was relative to the economy of its time, and how much wealth a ruler could command through a state. Those are not interchangeable measures. State production does not become a ruler’s personal net worth simply because the ruler held political power.
It also combines different ways of expressing value. An inflation-adjusted dollar amount estimates how a past sum translates into dollars in another year; comparing a fortune with the GDP of its own era asks how economically significant it was at the time. A GDP-share comparison does not show what that money would literally buy today. The 2014-dollar translations in the table are Money’s conversions using its chosen historical comparisons, not present-day appraisals.
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The underlying evidence varies as well: a reported estate or sale price is different from a historical estimate of economic output, and the surviving records are not equally detailed. That is why a precise-looking modern-dollar figure can imply more certainty than the evidence supports.
How to read the ranking without mistaking it for a net-worth list
- Keep ownership separate from control. The entries for rulers and political leaders rely substantially on access to imperial or national resources, not documented private balance sheets.
- Keep the date attached to every figure. The Gates number is explicitly for 2015, while the Carnegie, Rockefeller, Augustus, and Alan Rufus conversions are expressed in 2014 dollars.
- Treat estimates as attributed estimates. The figures and ordering above belong to Money’s 2015 article and the historians or other sources it cites; they are not a universally accepted historical standard.
- Be wary of false precision. Money itself says a reliable number cannot be assigned to Musa, despite his leading position in the ranking.
For Musa, historian Rudolph Ware, then an associate professor at the University of Michigan, put the difficulty memorably in Money’s article: “This is the richest guy anyone has ever seen, that’s the point.” It is an attributed comment about the scale of his reputation, not a measured net-worth estimate.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.So, who was the richest person ever?
If “richest” means the greatest private fortune measured on a consistent basis, this ranking cannot give a conclusive answer: its subjects lived under different economic systems, and several entries are based on command over state resources rather than personal ownership. If the question means who wielded extraordinary economic power, Money’s 2015 list offers one argued order, with Musa at number one—but the ranking remains debatable and method-dependent.
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