LOOK at the world's worst trouble spots and you can't fail to notice
they have one thing in common: tit-for-tat attacks between warring parties. Escalation of violence is incredibly destructive, yet we humans find it very difficult to break the vicious cycle. It seems we are not good at conflict resolution. Perhaps we could learn a lesson or two from the spotted hyena...

http://www.newscientist.com/channel/life/mg18624981.300