But why do communities care what we believe? Why do our peers reward or punish us? Consider the belief in an all-powerful moralizing deity—an authoritarian god, perhaps cast as a stern father, who promises to reward us for good behavior and punish us for bad behavior. An analysis of this kind of belief should proceed in three steps. (1) People who believe they risk punishment for disobeying God are more likely to behave well, relative to nonbelievers. (2) It’s therefore in everyone’s interests to convince others that they believe in God and in the dangers of disobedience. (3) Finally, as we
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