And in regards to MH and natural selection--some of our mental health issues may simply be a case of characteristics that were once optimal aren't in modern society. My anxiety and jumpiness worked against me on the phone when I worked in a call center but that same jumpiness saved me from stepping on snakes growing up in a remote area. And it is my understanding that there is such a thing as a nonviolent psychopath. A nonviolent psychopath might really have an advantage in today's modern world....