Venezuela
Venezuela is an example of a country become a more closed system. Because Economic Sanctions were imposed Entropy increased in the country resulting in a smaller economy.
People have engaged in Migration away from the country as a result. When the country was richer than it’s neighbours Migration occurred into the country instead.
This sanctions applied an Economic Step Function to the economy along with many other regulation changes.
This isn’t necessarily all bad though.
Sometimes it's helpful to destroy part of a system .
With the banking system for instance if Venezuela is part of the North American banking system which has a lot of terrible legacy technology then it avoids the Network effect of where an established standard stops the creation of new technology.
I am optimistic for the future of Venezuela.