> Sachs has popularized a strong finding: Distance from the equator
> explains a great deal of the variation in income *levels* between
> countries.  The further from the equator, the richer countries are.

So how do you explain the ancient Mayan, Azctec, Inca, Egyptian, 
Zimbabwe, and East Indian civilizations?

This "finding" seems to be a historical concidence stemming from Europe
having firearms and conquering the tropics.

Fred Foldvary 

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