Beliefs are a quintessential part of the human psyche, but they can be both healthy and harmful. And the beliefs of the fundamentalist Australopithecines are particularly harmful. These beliefs are what we call "delusions". Except unlike in a neuropsychological ailment, the delusion of the fundamentalists is not just harmful for the individuals suffering from it, but more importantly it is the greatest threat to peace, progress and wellbeing of the entire human species.