Series
Money
What money actually is and how it moves -- payments, fraud detection, central banks, and crypto. The systems that turn promises into balances. Part of Under the Hood.
Under the Hood · Money
What Money Actually Is
Everything you learned about money, the barter story, gold coins, the idea that it's a 'thing', is probably wrong. Money is a ledger, a promise, and a collective hallucination that runs the world.
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Under the Hood · Money
How Payments Work
When you tap your card, a message crosses at least four organisations in under two seconds. None of them trust each other. Here's how the money actually moves.
Read articleHow Fraud Detection Works
Every card transaction is a bet: is this the real cardholder, or someone who stole their details? The system has about 100 milliseconds to decide, and getting it wrong in either direction costs money.
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