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Both areas depopulated when the carrying capacity of the land collapsed.  Easter Island seems to have depopulated through starvation and war; there may have been some people who got off in the last canoes -- nobody knows.  Chaco Canyon depopulated by internal warfare, as there are instances of Chaco-like structures on easily defended buttes and mesas, but it seems most of the people scattered over thousands of square miles.  

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre
by ATinNM on Fri Jul 18th, 2008 at 03:03:47 PM EST
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