What did the classical gold standard era and the Bretton Woods System have in common?

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Both the classical gold standard and Bretton Woods System were based on cooperation among major powers. Under the gold standard, countries agreed to maintain a fixed exchange rate with gold as the anchor. Similarly, under the Bretton Woods System, participating countries agreed to maintain a fixed exchange rate with the US dollar as the anchor. In both cases, cooperation was necessary to maintain the stability of the international monetary system.

What Did the Classical Gold Standard Era and the Bretton