Sudden Neolithic population drop 'was the result of brutal warfare'

The so-called “Neolithic Y-chromosome bottleneck' is evidence of a time at which human genetic diversity was markedly reduced, concludes the report, written by a team of researchers led by Tian Chen Zeng, a sociology undergraduate at Stanford University in California. It appears over the course of the next 2,000 years, the Old World male population plummeted to one-twentieth of what it had been be

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男性だけで遺伝するY染色体が激減した理由は、単に戦いによって男性の人口が減少した結果と。長い間の疑問に答えが出た感はあるけど、この理由なら私でも思いつきそうで、あっけらかんとした。