One point which I’ve made on this weblog several times is that on a whole range of issues and behaviors people simply follow the consensus of their self-identified group. This group conformity probably has deep evolutionary origins. It is often much cognitively “cheaper” to simply utilize a heuristic “do what my peers do” than reason from first principles. The “wisdom of the crowds” and “irrational herds” both arise from this dynamic, positive and negative manifestations. The interesting point is that from a proximate (game-theoretic rational actor) and ultimate (evolutionary fitness) perspective ditching reason is often quite reasonable (in fact, it may be the only feasible option if you want to “understand,” for example, celestial mechanics).
Update: An ungated version of the paper.
I used to spend a lot more time talking about cognitive science of religion on this weblog. It was an interest of mine, but I’ve come to a general resolution of what I think on this topic, and so I don’t spend much time discussing it. But in the comments below there was a lot of fast & furious accusation, often out of ignorance. I personally find that a little strange. I’ve been involved in freethought organizations in the past, and so have some acquaintance with “professional atheists.” Additionally, I’ve also been a participant and observer of the internet freethought websites since the mid-1990s (yes, I remember when alt.atheism was relevant!). In other words, I know of whom I speak (and I am not completely unsympathetic to their role in the broader ecology of ideas).
But the bigger issue is a cognitive model of how religiosity emerges. Luckily for me a paper came out which speaks to many of the points which I alluded to, Divine intuition: Cognitive style influences belief in God: