Just last night i was watching a BBC documentary on psychopathy, a study was done to start to offer therapy to psychopaths in prison.
Shockingly, (or not to some), those that had received therapy went on to re-offend when released, and were more likely to continue this behaviour, than those who had not received any therapy at all.
This outcome completely baffled psychologists, understandably!
Psychology currently doesn't know how to deal with psychopaths. The studies have been vast, and there is no set 'rules' that makes a psychopath. They completely discount the notion that all psychopaths are born out of childhood horror experiences.
Schizophrenia also has been studied on a more cellular level and you'll now find published results of exactly the same cellular imbalances occuring in schizophrenics. Primarily the genetic enzymes responsible for breaking down free-radicals tend to be fully mutated in schizophrenics.
So these individuals bodies are akin to a toxic sewer - each cell drowning in toxic amounts of H2O2, lactic acids etc etc - which, when one looks at the effects of these toxicities, many symptoms are emotional/mood changes.
Often these outcomes are published, and it's a reminder that we exist in a polarity:
If thoughts/emotions effects cell health...then inversely, cell health effects thoughts and emotions.
Orthomolecular medicine pioneers in the field Pfeiffer and Walsh, demonstrated indeed that toxic cellular health creates 'mental illness'and with supplemental nutritional balancing eradicating even extreme forms of schizophrenia.
A more whole-istic view needs to be taken to determine route cause.
Too many are on one side of the fence or the other - and it hinders progress of both sides.