Final answer:
The Bretton Woods system pegged all currencies to the US dollar at fixed rates.
Explanation:
The system that involved pegging all currencies at a fixed rate to the US dollar was the Bretton Woods system.
In this system, the U.S. dollar was chosen as the reserve currency and was fixed to a weight in gold, initially at $35 per ounce.
This fixed exchange rate system aimed to maintain stability but eventually collapsed in 1973.
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