That doesn't sound right. Money is fungible. Anyone who missed the "window" to convert in 1971 (which major countries like UK, Germany, and France didn't, as fa

That doesn't sound right. Money is fungible. Anyone who missed the "window" to convert in 1971 (which major countries like UK, Germany, and France didn't, as far as I can see) still had their dollars. The US-domiciled gold that backed the dollars had always belong the US; so the dollars being an "IOU" makes sense in a colloquial sense, I guess, but it's a gross simplification that misses the broader point about how Bretton Woods affected monetary policy. It shifted the US into being able to maintain a permanent trade deficit, and the US was free to devalue the dollar (effectively the world's default currency) without repercussion, which is good for the US but not for everyone else.