" The absence of adult males upsets the natural order in our species and in others. For example, game wardens in South Africa recently had to kill several teenage male elephants that had uncharacteristically become violent. These young elephants behaved like a contemporary street gang—and perhaps for the same reason: There were no adult males in their lives. To solve the problem, park officials imported adult male elephants from outside the area. Almost immediately, the remaining juveniles stopped misbehaving. Testosterone ungoverned by experience is dangerous, and older males temper the craving for dominance—merely by being dominant themselves. "

― Gavin de Becker , Protecting the Gift: Keeping Children and Teenagers Safe (and Parents Sane)