[yossarian1408]

A decade of destabilisation in both countries could have been the straw that broke the camel's back, sure.

Argentina was already out of the rich-countries-club by the time the 70's had come around, and the bloody military coup you reference is likely the inevitable political instability that comes surely after sustained economic instability.

And as for Zimbabwe, the "civil-war" was hardly a destabilising event for the country, and the international isolation was easily evaded, this is well documented. I think Zimbabwe, once the bread basket of Africa as Rhodesia, is a great example of how self-determination might undermine an improperly equipped nation.