IT is the theoretical and empirical reality that dictates that Nation-states can only enjoy 2 of 3 economic privileges listed below;
-Sovereign monetary policy
-Free Capital flow
-Fixed exchange rate
Fixed exchange rate + Sovereign monetary policy
During this post-war period, Capital controls were not the taboo they are today, and it was frequently employed to keep the Fixed exchange rate alive.
Sovereign monetary policy + Free capital flow
In order to keep the Capital control to a minimum (and maintain export), Nations allowed their currencies to devalue against to USD (instant or over time).
Thats no coincidence though. "If people can print money, they will print money" @bitstein.
Because of this international monetary reality, were at a permanent standstill.
Because of its a non-sovereign nature, it has, by some sly way, completely circumvented the incapability of Nation-states to test out combination 3:
Free capital flow + Fixed exchange rate (1 BTC = 1 BTC)
I think combination 3 will win!!