*The Warrior Mentality*

[Harry]

I sometimes watch guys like George St. Pierre fight; highlights:

http://youtube.com/watch?v=c9hk60O9KU8

and it makes me wonder; what makes someone a warrior? Are these people born this way? Maybe bullied as kids and want to "get even"?

Just about everyone has been in at least one fight in their lives. But what makes some people thrive on extreme violence?

What in the human brain or the heart makes a warrior a warrior?