You're over-reaching. My parents raised me to be cooperative and less aggressive. It feels perfectly natural to me. The human brain is very malleable. There are some natural tendencies... I don't think the natural tendencies are quite what our society thinks they are. Socialization papers over most of them.
Try "socializing" an animal that lacks the evolved capacity for empathy. See how far you get.
We have incredibly complex apparatus in our brain with a dedicated purpose of socialization. Empathy, language, and cooperation are things which humans would not be capable of if we didn't evolve to do them.
