[quote=Darcs]
[citation needed]History says differently!
[/quote]

In another Crash Course (Crash Course big history, I think), John says that the murder rates might have been as high as 10%. Working hours weren't long, but that doesn't mean that life was not brutal.

According to Lawrence H. Keeley (an archaeology professor at the University of Illinois), 90-95% of hunter-gatherer societies have been involved in wars, wars which can produce casualty rates as high as 60%. For example, archaeologists have dug up pre-columbian mass graves with over 500 men, women and children, all of which were scalped.