Prior research has found mixed evidence for the long-theorized link between religiosity and pro-social behavior. To help overcome this divergence, I hypothesize that pro-social behavior is linked not to religiosity per se, but rather to the salience of religion and religious norms. I report a field experiment that examined when auction participants will respond to an appeal to continue bidding for secular charitable causes. Religious individuals are more likely than non-religious individuals to respond to an appeal “for charity” only on days that they visit their place of worship; on other days of the week, religiosity has no effect. Notably, the result persists after controlling for a host of factors that may influence bidding, but disappears when the appeal “for charity” is replaced by an appeal to bid for other (i.e., competitive) reasons. Implications for the link between religion and pro-social behavior are discussed.

Should a Catholic hospital abort a life-threatening pregnancy or let a pregnant woman die? Should a religious employer allow his employees access to contraceptives or break with healthcare legislation? People and organizations of faith often face moral decisions that have significant consequences. Research in psychology found that religion is typically associated with deontological judgment. Yet deontology consists of many principles, which may, at times, conflict. In three studies, we design a conflict between moral principles and find that the relationship between moral judgment and religiosity is more nuanced than currently assumed. Studies 1 and 2 show that, while religious U.S. Christians and Israeli Jews are more likely to form deontological judgments, they divide between the deontological principles of inaction and indirectness. Using textual analysis, we reveal that specific beliefs regarding divine responsibility and human responsibility distinguish inaction from indirectness deontologists. Study 3 exploits natural differences in religious saliency across days of the week to provide causal evidence that religion raises deontological tendencies on Sundays and selectively increases the appeal of inaction deontology for those who believe in an interventionist and responsible God.