The snarls and sneers that keep violence at bay.
The ability to mete out violence appears to be linked to survival in the animal kingdom. But a handful of researchers is now making a persuasive case that scores are settled far more often by subtle, nonviolent signals such as a curled lip or a snarl. Their provocative idea is that inflicting violence on a member of one's own species is a pathological condition that arises when these signals are missed or misinterpreted.
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Pennisi
D000374:Aggression; D000818:Animals; D001522:Behavior, Animal; D006801:Humans; D010551:Personality; D012919:Social Behavior; D012930:Social Dominance; D014754:Violence