PERSON
Thomas Piketty
The French economist who proved that wealth concentration is the default of capitalism—and whose formula r > g has become the sharpest lens for measuring who will capture the extraordinary returns of AI.
Thomas Piketty is the economist of inequality’s arithmetic. His 2013 masterwork
Capital in the Twenty-First Century assembled three centuries of tax records from more than twenty countries and compressed the finding into a formula small enough to fit on a napkin: when the
rate of return on capital exceeds the rate of economic growth, wealth concentrates at the top. The formula is not ideology—it is arithmetic, as stable across the Belle Époque and the Gilded Age as gravity across centuries. What separates Piketty from prior critics of inequality is the instrument he built: a measurement apparatus so comprehensive that the debate shifted from whether concentration is happening to
why, and from why to
what to do. The
Engels Pause—the fifty-year lag between the onset of industrial productivity gains and their translation into broadly shared prosperity—is Piketty’s warning for the AI age: the gains arrive first and flow to capital; redistribution requires deliberate institutional construction, or it does not happen. Against