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View Diary: Let's read a book together! Guns, Germs and Steel: Chapter 2, a Natural Experiment of History (50 comments)

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  •  I can't let go of the Bison (2+ / 0-)
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    plf515, ER Doc

    Has JD ever discussed them in relation to his theory?

    Republicans are walking the socio Path.

    by 88kathy on Sun Jul 26, 2009 at 06:00:06 AM PDT

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    •  Well, he doesn't claim that (2+ / 0-)
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      88kathy, ER Doc

      all large animals were killed every time humans showed up.  But it happened a lot.

      •  I thought he was making the point that (1+ / 0-)
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        plf515

        it had something to do with movement when it did happen.  Why didn't it have the opposite effect in North America?  It seems to me that they crossed the Bering Strait and zipped down to Patagonia like there was nothing to eat.

        Or was he saying that they went down the coast and did the Buffalo on the way back?

        Republicans are walking the socio Path.

        by 88kathy on Sun Jul 26, 2009 at 06:18:28 AM PDT

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        •  I don't understand what you are asking. (1+ / 0-)
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          88kathy

          But the movement through the Americas wasn't THAT fast.

          It took about 2000 years, per his map.  And, from Alaska to the southern part of South American is perhaps 7,000 miles (I can't find a good reference in quick googling).  So, that would be 3 or 4 miles per year.

          •  maybe my math is bad (2+ / 0-)
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            plf515, ER Doc

            I am thinking that it took 980,000 years to get to the Bering Strait from Africa.

            Republicans are walking the socio Path.

            by 88kathy on Sun Jul 26, 2009 at 06:43:35 AM PDT

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            •  Yes, but for most of that time (2+ / 0-)
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              88kathy, ER Doc

              people weren't moving through the territory.

              To be able to live in Siberia required technological advances in clothing and shelter.  Once humans invented those, they proceeded.  

              •  So Siberia was the technological obstacle (2+ / 0-)
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                plf515, ER Doc

                the America's had none to block the urge to move on.  That must have been part of the reason they kept going.  We still like to do that.

                Republicans are walking the socio Path.

                by 88kathy on Sun Jul 26, 2009 at 07:03:33 AM PDT

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              •  Dr Alice Roberts new TV series... (1+ / 0-)
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                88kathy

                ... "The Incredible Human Journey" suggests that people crossed the Bering Straits by sea and not on foot, then streaked down the west coast of the Americas, before diffusing east into the continental interior on foot. Which accounts for archaeological evidence of settlement in South America almost simultaneous with, and sometimes before, evidence of North American settlement.

                This suggests the tech advance was coastal sea travel, though that would in turn suggest that humans didn't "take" tens of thousands of years to get from Africa to the Bering straits, but rather spread round Asia very quickly, and then took tens of thousands of years to make the jump across the straits.

                •  that makes much sense (0+ / 0-)

                  fishing and digging clams all the way.  Beaches get crowded real fast because they are so thin.  And as you move south from Alaska it just gets better and better (food and climate).

                  Republicans are walking the socio Path.

                  by 88kathy on Wed Jul 29, 2009 at 03:27:01 PM PDT

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