There are specific zones in the brain linked to aggression and violence.
The front region of the brain, or the prefrontal cortex, including the limbic system, appears to play an important role in violent behavior.
The link between the prefrontal cortex and violence was first revealed in 1848 in the case of a railroad worker, Phineas Gage, whose skull was impaled by an iron rod in an explosion — damaging the front part of his brain.
If we can examine the brain, we may be able to prevent violence.
story at physorg