The evidence that was put forward by Richard Wrangham to support his hypothesis that intraspecies aggressiveness was common in the last common ancestor of chimpanzees and humans is that <u>chimpanzees conduct raid against individuals in neighboring territories.</u>
Intraspecies aggressiveness is the form of aggressiveness between humans beings and other animals. They're a threat of action that brings about harm.
Richard Wrangham put forward evidence to support his hypothesis that <em>intraspecies aggressiveness</em> was common as he stated that chimpanzees conducted raid against individuals in neighboring territories.
