People with the so-called 'warrior gene' exhibit higher levels of behavioral aggression in response to provocation, according to new research co-authored by Brown University political scientist Rose McDermott. In the experiment, subjects penalized opponents by administering varying amounts of hot sauce. The findings are published in the Proceedings of the National Academy of Sciences. In reality this is actually identifying the gene for conduct disorders or ASPD. Or the genetic predisposition for it to occur given the right nature/nurture situation. It would be awesome to be able to get that test done on kids from an early age.