I'm pretty confident there's good evidence supporting a connection between "early childhood adversity" and the development of schizophrenia, but I'm inclined to agree: once the system has gone off the rails, it's probably too late for environmental intervention to rein things back in. And that's assuming there's any reliable way to initiate and maintain those environmental changes.

Realigning the internal systems involved in schizophrenia seems at least as important as improving external systems that might provoke it.