these are different conditions, not things that lead to other things.
where did this chart come from? it's not just wildly inaccurate, it's meaningless.
if you want to know about what makes psychopaths (the modern term is sociopath), read Hare. he's the world expert, and works with the FBI in that capacity, etc.
psychopathy is a specific condition, the key trait of which is lack of empathy/conscience.
schizophrenia is a different thing entirely, and empathy or lack thereof isn't a factor.
ADHD is not the same thing as manic depression (nor is it the same as mania alone), or the modern term "bi-polar" (swinging between the two poles of depression and elation).
and so on. also "psychopath" and "psychotic" are two different things. psychotic is to distinguish from "neurotic." in psychosis, one can experience such things as delusions, hallucinations, and in general is living in a world that's not much like what most people live in. functioning is profoundly disturbed, as are other things. people can have psychotic breaks yet be not psychotic before and after the breaks.
neurotic is, you could say, extreme unhappiness and rigid, unhelpful way of dealing with it (this is my definition here, i'm waaaay paraphrasing): phobias, ocd, and so on. the person is aware of whats' around them, they're not delusional or having odd sensory phenomena, they can (usually) work and so on.
sometimes one can be depressed and it can indeed intensify into psychotic depression, but it's not the norm and it's not moving from one type of disorder into a different one.
autism--as i'm understanding it--isn't a psychiatric illness at all, it's a neurological condition. (i may be off here, i don't yet know as much about autism), and since it's not an illness, there's no treatment for it. if an antistic person becomes, say, schizophrenic, it's not because they're autistic and in fact, is unrelated.
to my knowledge, sociopaths are in a class by themselves and are also basically untreatable, and indeed, it may turn out to be a neurological condition as well. one more myth to explode: most sociopaths are not killers, they're just assholed. think banksters and monsanto and the neighbor who screws your wife while you're in the hospital getting your appendix out.