This was on the honor system.
During this honor system, the Federal Reserve refused to allow any audits or supervision of its printing press.
They didn't honor their promise.
In response, the countries asked for their gold back.
This set off a rapid devaluation of the dollar.
Nixon refuses.
Nixon then *temporarily* suspends the convertibility of the dollar into gold.
Hint...this was NOT a temporary suspension.
Rather, it was a permanent default.
Everything America needed came in.
And thus, the United states got very, very rich.