@hugmug, you never say how they can save humanity? I agree, everything has a purpose. I believe their purpose is to show us the consequences of poor lifestyle habits, lack of love and attention. It is now well established in the literature the affects of traumatic childhood experiences, lack of love and attention, poor nutrition and lifestyle on the gut microbiome, which is critical to all aspects of human life including mood and behavior. The sum total of all of these stressors produce a brain that has less connections, as you mention, between the prefrontal cortex and the fear and impulse centers of the brain making us less able to understand social queues and less able to control our behavior, more prone to psychsocial problems. Bringing this awareness to the general population, with psychopaths as examples, is one way they can help. Is this your purpose. Thanks for the thought provoking message.