Triffin’s Dilemma

In 1960, an economist named Robert Triffin sat before the US Congress and pointed to a contradiction so deep that the dollar-based system was, in effect, living on borrowed time. It wasn’t a mistake any government could fix by trying harder. It was structural — and, remarkably, it’s still with us today.

The impossible job

When your national currency is also the world’s money, you are handed two duties that flatly contradict each other. The world needs an ever-growing supply of dollars to trade with and to save in — which means the US must send more dollars out than it takes back, running permanent deficits. But the more dollars pile up overseas, the shakier the promise that each one is truly worth its gold. Supply the world, and you undermine your own money. Defend your money, and you starve the world of the liquidity it runs on. You cannot do both at once.

It wasn’t greed — it was a trap

This reframes what happened in 1971. It’s easy to say America simply printed too much to pay for the Vietnam War and its “guns and butter” spending — and it did. But Triffin’s point cuts deeper: any country whose money became the world’s reserve would face the very same bind. The dollar didn’t break because Americans were uniquely reckless. It broke because the job itself is impossible. Bretton Woods was doomed on the drawing board.

Still unresolved

We never solved it. The dollar is still the world’s reserve, the US still runs vast deficits to supply it, and the same tension quietly shapes global finance — from chronic trade imbalances to the mountains of US government debt that other nations feel compelled to hold. Triffin’s dilemma is the reason a single national currency can never be a truly stable money for the whole planet.

This is the sharpest argument for a reserve money that belongs to no nation — which is exactly what Keynes’s bancor tried to be, and exactly what Bitcoin is. A neutral money has no home country to serve, so it carries no impossible dual duty. It simply follows its rules, the same for everyone.

Triffin was right. Eleven years after he testified, the contradiction he named finally snapped — in a single television broadcast, on an August evening in 1971. Next.

Key takeaways

Triffin’s dilemma: a national currency that is also the world reserve faces contradictory duties — flood the world with money OR keep that money sound, but not both.
It reframes 1971 as a structural trap, not merely US overspending — and it is still unresolved.

Check yourself

What is Triffin’s dilemma?

What does Triffin’s dilemma reveal about 1971?

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