Huh?
People have a lot to learn about the biological basis of aggression, said Harvard neurobiologist Edward Kravitz, one of the study's authors. "It goes without saying aggression, as well as violence, in society is a serious problem. It has to have biological roots. And the biological roots will have genetic components and experiential components," Kravitz said in an interview.
Thanks for asking. It is patently absurd but common for materialists, to say such a thing as "aggressions's basis is found in biology." How do they know? Did they put it there?