psychopathy is a developmental error caused by prevocal trauma conditioning, which stops the development of the emotional mirror reflex, that some call "empathy" but is more accurately called sympathy, since it is unconscious.

i dunno if there is an evolutionary solution to this problem because this behaviour HAS TO be learned, it is such broad scope it touches the entire neurocircuitry.

it's simply, once this disease infects the population, it is gonna keep on consolidating and expanding until a final point at which every human will need to be tested for it and executed if they fail.

i didn't make the rules.