Part of their brains have been affected in ways I've only partially got figured out. Basically a percentage of the population has been affected by "something" which makes the individuals completely incapable of thinking. The reality of it is that the government conditioned these people. But what I need is an explanation that the government could use (brief, concise, and in somewhat layman's terms please) for a chemical imbalance that must occur for a person to become completely enraged, or generally having no sense of conscience or goodness? Just a way to explain what chemicals have to be missing or altered for a person to become a reject of their own society. From that, I'm pretty sure I'll be able to come up with an explanation for why those occurrences took place. (This is eventually going to be the "justification" for these people's "extermination" so it needs to be convincing to the rest of the non-thinking or general population who have not been "affected" in this way yet and accept mostly anything as truth.) Conditioning could be the cause for something like that, right? Or is there something different?