What do you think of the quote from T2: Judgment Day "It's in your [humans'] nature to destroy yourselves"?

T2, for those who haven't seen it, stands for Terminator 2. CA Gov. Schwartznegger is the star of the film. A cyborg (robot with organic skin,etc.) tells a little boy (one of the main characters) that we, humans are a self-destructive group. When one reflects on all the conflict of Y! Answers, there seems to be a certain logic to that quote. It appears we have this inherent drive to battle each other...even when it's unnecessary and ridiculous. I'm quite guilty. Do you think we fight injustice or we just fight for supremacy? Is there any genus/species rationale? Any biological rationale?