The Bretton Woods system was a predecessor of the Eurozone (Fixed exchange rate currency). Saying, that in order to have a healthy common monetary union you need to have a federal union first. Otherwise things crashes, as happened to bretton woods and as it’s happening on the eurozone
The Euro is not fixed to anything, but its value floats freely like any other currency. It is "fixed" to Eurozone members in the sense that they can't value/devalue it by themselves.
Comparing the Bretton Woods system to the Eurozone is not a direct comparison
Fixed exchange rate meant as if all countries in Europe would have a fixed exchange rate between them (even if they would use different currencies). Hence the comparison eurozone-Bretton Woods
