The chimpanzee and the human share about 99.5 percent of their evolutionary history, yet most human thinkers regard the chimp as a malformed, irrelevant oddity, while seeing themselves as stepping stones to the Almighty.
If... deceit is fundamental to animal communication, then there must be strong selection to spot deception and this ought, in turn, to select for a degree of self-deception, rendering some facts and motives unconscious so as not to betray - by the subtle signs of self-knowledge - the deception being practiced.' Thus, 'the conventional view that natural selection favors nervous systems which produce ever more accurate images of the world must be a very naive view of mental evolution.