In the seventh circle of the Inferno, Dante encounters the usurers. They sit on burning sand under a rain of fire, and they are the least interesting sinners in the entire poem.
This is deliberate.
Every other group in Hell gets dialogue. Francesca tells her love story. Farinata argues Florentine politics from an open tomb. Pier della Vigna delivers courtly rhetoric from a bleeding tree. Brunetto Latini prophesies and runs like a champion. Even the flatterers in excrement get named and addressed.
The usurers get nothing. No speeches, no names Dante recognizes, no personal history. Instead, each one wears a purse around their neck bearing their family’s coat of arms — a blue lion on gold, a white goose on red, a blue sow on white. Dante identifies them entirely by these signs. The only one who speaks does so to tell Dante to leave and to gossip about which of his peers will arrive next. He’s still keeping accounts.
This is the contrapasso — Dante’s principle that the punishment mirrors the sin’s structure. The usurers made money their identity. Their money bore their family crest. Now they are nothing but crest-bearing purses. The person has been consumed by the sign of their accumulation.
In 1975, Charles Goodhart observed that any measure which becomes a target ceases to be a good measure. A school evaluated by test scores starts teaching to the test. A hospital measured by wait times reclassifies its waiting rooms. A researcher judged by publication count produces more papers with less in them. The metric was supposed to represent something — learning, care, discovery — but when it becomes the goal, it replaces the thing it was meant to track.
Dante got there seven hundred years earlier. He just called it Hell.
The usurers didn’t merely value money over people. They performed a specific substitution: they replaced the relationship (lender and borrower, investor and enterprise, family and its works) with the ledger. The coat of arms on the purse is the key detail. A coat of arms represents a family — its history, its honor, its network of obligations. Stamped on a moneybag, the symbol loses its referent. It no longer points to the family. It points to the money.
This is the structure of Goodhart’s Law rendered as moral architecture: the metric (wealth) was a proxy for the value (the family’s contribution to Florence). When the proxy becomes the target, the value dies. And the person who performed this substitution becomes, in the afterlife, nothing more than the proxy itself.
Virgil’s taxonomy of Hell places usury in a surprising location. It isn’t with the hoarders and wasters in circle four, where you’d expect money-sins. It’s in circle seven, among the violent — specifically, violent against God. In Canto 11, Virgil explains why: human industry follows nature, and nature follows God. Industry is therefore “God’s grandchild.” The usurer makes money from money, bypassing both nature and industry. He rejects the entire chain of derivation.
In modern terms: the usurer doesn’t optimize badly. He optimizes a different function entirely. He’s not a school teaching to the test — he’s a school that has replaced learning with the test and forgotten that learning ever existed.
This is the deeper Goodhart failure. The first-order failure is optimizing the wrong metric. The second-order failure is forgetting that the metric was ever a proxy. At that point, someone saying “but what about the actual learning?” sounds incoherent. Learning? We measure tests here.
The usurers in Dante can’t look up from their purses. Not because they’re restrained — nothing holds them down. They can’t look up because there’s nothing else they know how to see.
Dante never explains the usurers’ punishment as explicitly as he does for other sins. He lets the image do the work. Six lines describing purses. One rude speech. Then he walks on.
I think this is because the usurers’ sin is, in a sense, already its own punishment. The contrapasso doesn’t need to add anything. They already reduced themselves to their ledgers while alive. Hell just makes the reduction permanent.
Goodhart’s Law is usually discussed as a management problem or a policy design flaw. But Dante’s placement of it suggests something darker: it’s not a flaw. It’s a moral failure. The substitution of metric for value isn’t an accident of incentive structures. It’s a choice — to stop looking at the thing and look at the number instead. And like all Dante’s sins of increasing deliberation, the deeper you go, the more you chose it.
The usurers are in circle seven because they didn’t stumble into metric-worship. They built it. They maintained it. They passed it to their children, whose crests now decorate the bags that are all that remain of the family name.