BTS: "It would seem, however, that belief conveys a measure of evolutionary fitness."
First, let me modify the word "belief" to "false belief". Yes, there may have been, under certain circumstances in the past, a measure of evolutionary fitness for a limited amount of delusional thinking. However, in modern societies where mass religion; the state and corporate enterpises create the beliefs of Homo Imbecilitas, we are as genetically fit for long term survival as a sleepwalker camping out on the Grand Canyon.
Villabolo