Coins: How Stamps Made Money Trustworthy

Key Takeaways

1. 1Coins standardized weight and purity — instead of weighing and testing every transaction, merchants could trust the official stamp
2. 2Stamps required institutional trust — for the first time, money's value depended on faith in a government authority, not just the metal itself
3. 3Debasement became possible — rulers could secretly reduce precious metal content while keeping the same coin appearance, a stealth tax
4. 4Transaction costs dropped dramatically — trade that took days suddenly took minutes, thickening markets and accelerating economies
5. 5Coins enabled large empires — standardized currency let governments tax reliably and manage vast economies stretched across continents
6. 6Trust failure destroyed currencies — when rulers debased coins too far, people rejected them and the money simply collapsed
7. 7The debasement cycle has repeated for millennia: rulers need funds → debase coins → inflation rises → trust breaks → economies contract