[ExI] Strange mystery explained

Keith Henson hkeithhenson at gmail.com
Mon Jun 4 23:39:40 UTC 2018

There is another more popular sort of article here:


Best wishes,


On Mon, Jun 4, 2018 at 1:12 PM, Keith Henson <hkeithhenson at gmail.com> wrote:
> A few years ago there was considerable news about genetic studies that
> at first looked like 17 women were reproducing to every man who did
> so.  There was a lot of discussion but no consensus emerged.
> Now a couple of students at Stanford have published a potential
> solution.  How they reached this solution is fascinating in itself.
> However, to cut to the chase, it looks like patrilineal early farming
> groups were killing off each other's males.  This considerably
> diminished the variations of Y chromosomes since when one group got
> the upper hand, it was common for the winners to kill the losers to
> the last man (and boy) and take the young women as booty.  It seems
> this process started when the Neolithic agricultural revolution began
> and ended when violence between patrilineal clans was suppressed by
> Chieftains or a State.
> https://www.nature.com/articles/s41467-018-04375-6#article-comments
> It's not an easy article to read, but worth it.  It's a case where a
> social/cultural invention (agriculture) eventually resulted in a huge
> genetic change. I wonder if there is a signal in that data of how
> often war between the tribes broke out?  This would give us an idea of
> how fast the population reproduced in the early days of agriculture.
> The quote from Numbers seems to be backed up by genetics.
> Wow.
> Keith

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