www.livescience.com -
Natural selection wants us to be crazy — at least a little bit. While true debilitating insanity is not nature's intention, many mental health issues may be byproducts of the over-functional human brain, some researchers claim.
As humans improved their gathering, hunting and cooking techniques, population size increased and resources became more limited (in part because we hunted or ate some species to extinction). As a result, not everyone could get enough to eat. Cooperative relationships were critical to ensuring access to food, whether through farming or more strategic hunting, and those with blunt social skills were unlikely to survive, explained David C. Geary, author of "The Origin of Mind" (APA, 2004), and a researcher at the University of Missouri.......
