If money is a just a yardstick, what then does it measure? The answer was simple: debt. A coin is, effectively, an IOU. Whereas conventional wisdom holds that a banknote is, or should be, a promise to pay a certain amount of “real money” (gold, silver, whatever that might be taken to mean), Credit Theorists argued that a banknote is simply the promise to pay something of the same value as an ounce of gold. But that’s all that money ever is. There’s no fundamental difference in this respect between a silver dollar, a Susan B. Anthony dollar coin made of a copper-nickel alloy designed to look
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