No I agree, short of a proper international communist system it's probably the best appproach. However, it could possibly slip back to Mercantilism and a whole heap of resource grabbing wars.
The result of the way the market has grown means we're all pretty much interdependent so true protectionism would require a nightmarish web of international contracts so that each nations internal market could actually function (or at least transition itself safely). Still, it's reasonable. I actually see something like this happening, but I see it happening at great expense to smaller (economically) nations.
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