A rule of thumb as to what countries, on average, are capable of doing...
IQ's matter but there are exceptions of what a country can do.example
the USA , can import the highest and the brightest and is the best economy in the world. I have a theory for the american miracle. They are totally focused. They don't carry a lot of irrelevant information like a European does. If someone does irrigation that person knows all about irrigation and knows nothing about geography, history or Opera. Not a good company for a dinner but very effective.
exceptions: tourism and natural resources can change a bit the fate of a country.
why IQ's differ so much
clean water
hygienic habits
and of course same family marriages destroy your brain
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