Abstract Religiosity has been linked with prosocial behavior and a preference for religious ingroups over outgroups. Yet, there are important differences in religious people’s beliefs, values, and practices. Fundamental and quest orientation toward religion may differentially predict intergroup bias in prosociality. Also, individualizing and binding moral foundations may have diverse effects on ingroup and outgroup bias in helping, as moral foundations theory (MFT) suggests that individualizing and binding foundations differ in how much they focus on ingroup and outgroup moral considerations. In this study, we examined the relationship between religious dimensions (quest religion, religious fundamentalism, intrinsic religiosity, and religious activity), moral foundations, prosocial behavior, and intergroup bias in helping. We found evidence for the effect of individualizing foundations, religious fundamentalism, and quest religion above and beyond demographics and other religious dimensions on intergroup bias in helping. Furthermore, there were independent positive effects of individualizing foundations, religious activity, and age, and independent negative effects of female gender and religious fundamentalism on prosocial behavior. This study provides a more nuanced understanding of the relations between religion, prosociality, and moral intuitions in a Muslim context.

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