Five factors leading to societal collapse

Written by Jared Diamond

I don't know of any case in which a society's collapse can be attributed soley to environmental damage.  I arrived at a five-point framework of possible contributing factors that I now consider in trying to understand any putative environmental collapse.  Four of those sets of factors--environmental damage, climate change, hostile neighbors, and friendly trade partners-- may or may not prove significant for a particular society.  The fifth set of factors--the society's responses to its environmental problems--always proves significant.

Jared Diamond, Collapse, p.11

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