I wondered back in grad school while reading about the evolutionary origins of speech and music if religion hadn’t played a role in the evolution of civilization, and more to the point, man’s desire to be charitable to his fellow man. I remember reading that evolutionary scientists had struggled to discover why people were charitable. Game-theory experiments result in a single selfish player adulterating the entire population within a handful of generations.
The idea really congealed for me several years back when I traveled to Japan for the first time. That was my first encounter with a Buddhist culture, and I saw that karma played the same role in a Buddhist culture that the concept of an all-knowing God does in western society—that is, it gave people a reason to be honest and play fairly. If our pre-historic ancestors developed a fear that they would be punished, either by karma or an all-seeing/all-knowing God, then even the selfish might have followed the rules in exchanges of altruism. And it’s precisely these rules that make society work.
A biological-wiring theory might explain the prevalence and resilience of religious belief around the world, even in light of overwhelming evidence regarding the inaccuracy of virtually every religious origin mythology.
It might also explain cultural phenomena, such as the fact that people, even the non-religious, statistically have difficulty trusting atheists.
Anyway, it’s fascinating to see that evolutionary psychologists are pursuing this line of reasoning.