In January 1934 a report was delivered to the United States Senate. The country was four years into the Depression and nobody could say with any precision how bad it was. Eighteen months earlier the Senate had asked for a figure. Simon Kuznets, the economist leading the team producing it, now had one.
Kuznets had been in America for only twelve years. Born in Pinsk in the Russian Empire, he arrived in 1922, studied at Columbia, and joined the National Bureau of Economic Research five years later. He was a statistician who distrusted numbers without context. Economies, he believed, had to be read alongside history, demography, and society. Nearly four decades later, he would receive the Nobel Prize.
His report showed that the income of the United States had roughly halved in three years, from about eighty-three billion dollars to forty. For the first time a country could see its own economy whole. The method behind that figure is the forerunner of what we now call GDP.
Buried in the same document was a caution. The welfare of a nation, Kuznets wrote, can scarcely be inferred from a measurement of national income. He had built the instrument and, on the same page, marked its edge. It measured production. It did not measure whether life was going well.
The warning was in the founding document. For ninety years, we have behaved as though it wasn't.
What the number built
The instrument was too useful to remain modest. Here was a single figure, comparable across countries and quarters, and finance ministers looked up. By the end of the war it was written into the architecture of the postwar order, and within a generation it had stopped being a measurement and become a purpose. Governments no longer merely reported growth. They rose and fell with it.
For a long stretch the proxy held. Rising output genuinely did mean fewer children buried, more roofs that did not leak, more years of school. When a country was poor, the number and the life moved together, and treating one as a stand-in for the other was reasonable.
And not only governments wanted it. A number is what a reporter can put in a headline, what an opposition can attack in one line, what a reader can carry away from the news. Ministers want a number. Editors want a number. Markets want a number by half past eight in the morning. What none of them can use is a paragraph explaining that the situation is complicated.
So we chase the number. And the thing the number was standing in for goes quietly unattended.
Where it came apart
Then the number and the life came apart — not everywhere, but precisely where the theory said they shouldn't. Worldwide, Gallup finds more people thriving than at any point since it began asking in 2005; growth is still doing its old work in economies that are still poor. In the richest ones it has stopped. In the United States and Canada, the share of workers who rate their lives well enough to count as thriving held between 59 and 62 percent through the 2010s. By 2024 it had fallen to 52 percent, the sharpest drop Gallup had recorded in the region since it began tracking. Output rose throughout. Worldwide, about one employee in five is engaged at work at all.
The world grew, but it did not flourish.
This is not an argument against growth, nor that Kuznets was wrong. He was right, and he said so first. It is an argument that we kept using the old map on new terrain.
Someone did notice. In the summer of 1989, a Pakistani economist began telephoning an old friend in Finland, asking him to help build a rival number — one that would measure not what a country produced, but how its people were actually doing.
It worked. That is the part of the story that should worry us.