The Problem With Barter

Before money existed, people traded things directly. A farmer with wheat could swap it for tools. A fisherman could trade fish for a pair of shoes. Sounds simple, right? In practice, it was very hard.

The problem was finding the right person. You needed someone who had what you wanted — and who also wanted what you had, at the same time, in the same place.

Imagine a farmer who wants a haircut. He has plenty of wheat, but the barber doesn't want wheat today. So there's no deal, and the farmer stays hungry for a haircut.

There was another problem too. How much wheat is one haircut worth? Half a bag? Two bags? Nobody knew, because there were no fixed prices. Every trade started as an argument.

So people looked for one thing that everyone would accept. Some used salt, some used shells, and many used cattle — cows. It worked better than trading things directly, but it still wasn't perfect. Cows are hard to carry, salt melts in the rain, and shells wash up on the beach for free.

Slowly, people learned what good money needs to be. It has to be easy to carry. It has to last. You have to be able to split it into smaller parts. And it has to be hard to find, so it holds its value.

One thing fit all of that better than anything else: metal.

Tomorrow: money has three jobs — and most people know only one.