MCS Student in the Stanford News

photo of three students
Wars and clan structure may explain a strange biological event 7,000 years ago, Stanford researchers find

Genetic data suggest there was a collapse in male, but not female, genetic diversity starting 7,000 years ago. The reason may be wars between clans structured around male ancestry.

 

https://news.stanford.edu/2018/05/30/war-clan-structure-explain-odd-biological-event/