A fairly wide ranging survey. One aspect that stood out to me was:
Religious Americans whose immediate social circle includes members of other faiths, or none at all, express less certainty about their own religious beliefs. Conversely, Americans who have less religiously diverse social networks report having fewer doubts about their belief in God. This pattern is remarkably consistent across religious traditions.
I donāt know if Iād phrase it as āpeer pressureā. āGroup thinkā or āpeer reinforcementā might be better descriptors. Itās far easier not to doubt if nobody in your immediate circle (who are likely to be among those whose opinions you place the most trust in) holds a contrary opinion. Out of sight, out of mind.