the evil males who cause war (good morning america)

About 916:

After losing a ball game to an older boy, a six-year old Icelander named
Egil drives a heavy ax into the older boy's brain. This killing was not
adjudged homicide because it was done in broad daylight before witnesses,
and was deemed justifiable because the older boy had gloated over his
victory in front of Egil. Egil's mother expressed pride in her son for his
actions, for she believed that it showed that he had the makings of a good
Viking. Matronly delight in raising homicidal children recurred a thousand
years later among New Guinea headhunters and the feather-awarding women of
Great War Britain, and suggests that mothers play vital parts in creating
and sustaining cultures in which men revere violence.