CSU San Marcos President Talks About Why societies collapse | Jared Diamond 1 day ago   05:07

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Why societies collapse | Jared Diamond CSU San Marcos President Talks About 1 day ago   19:49

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http://www.ted.com Why do societies fail? With lessons from the Norse of Iron Age Greenland, deforested Easter Island and present-day Montana, Jared Diamond talks about the signs that collapse is near, and how -- if we see it in time -- we can prevent it.