You see mentally ill people who have in-congruency in their amygdalas and prefrontal cortex.. The prefrontal cortex is highly responsible for maturation and acting in way that is able for societal sustenance. Grown people, and even people developing in such brain region will have immature behavior when discrepancies and deformity are experienced within it.. They will be often deemed mentally ill. It is a big deal, and one that our welfare and criminal systems do not yet account as for. (It is big enough deal to where someone who has not developed well enough in this brain region, would clinically be by psychology, labeled mentally ill. And yet our society demands people who have not yet grown into it fully to expect fully functional as an adult).