Somewhere around the fifth century, a merchant in Timbuktu could trade a pound of salt for a pound of gold. This ratio — which strikes modern ears as absurd — made perfect sense in a world where salt preserved the only protein most people would eat all winter, and gold was just a pretty metal you couldn't do much with.
The story of money is, at its root, a story about what human beings agree to pretend is valuable. And that story starts on the trade routes.
The Saharan Exchange
The trans-Saharan trade routes are among the oldest in human history. Caravans of sometimes ten thousand camels crossed the desert carrying salt from the mines of Taghaza south to the gold-rich kingdoms of West Africa. The return journey brought gold north to the Mediterranean world.
What's remarkable about this system is not the goods themselves but the trust architecture that made it work. These caravans crossed territories controlled by different peoples, passed through regions with no shared language, and completed transactions that took months from initiation to settlement. The system required — and generated — an elaborate network of intermediaries, guarantors, and customary laws that functioned as a kind of decentralized financial system centuries before anyone invented the term.
From Commodity to Abstraction
The leap from "salt is valuable because you can eat it" to "this piece of paper is valuable because we all agree it is" didn't happen overnight. It happened in thousands of small steps, each one a tiny increase in abstraction, each one requiring a slightly larger circle of trust.
Cowrie shells. Silver coins. Letters of credit. Bank notes. Fiat currency. Bitcoin. Each step in this progression represents a society saying: we trust the system more than we trust the thing.
"Money is a shared fiction. The question is not whether the fiction is true, but whether enough people believe it."
Bretton Woods and the End of Pretending
In July 1944, delegates from 44 countries gathered at a hotel in New Hampshire to decide what money would mean after the war. The system they designed — pegging currencies to the dollar, and the dollar to gold — was the last attempt to anchor the fiction of money to something physical.
It lasted 27 years. When Nixon closed the gold window in 1971, he didn't just end a monetary arrangement. He completed a journey that began on the salt roads of the Sahara: the full transition from money-as-thing to money-as-agreement. The salt merchant in Timbuktu, who traded something useful for something pretty, would have found the whole arrangement deeply suspicious.
He might have been right to.