Did it? Or was it Bretton-Woods that failed? If I remember my History, Nixon decoupled the USD from gold to regain the ability to devalue the dollar, as a tool for dealing with the huge debt accrued during the Vietnam war.

It wasn't a gold-currency world, it was a world of gold-backed US dollar. It makes a huge difference. While the advantages of being a reserve currency superceded the disadvantages of not having monetary control, Bretton-Woods stood. Once the tables turned, the US ended the gold backing.

Bretton Woods stood for close to 40yrs. The current system has about the same age and much as Bretton Woods is failing because the US abused its position as reserve currency to wage war financed by debt. History does repeat itself, in slightly different color tones...