Across the social sciences, a key question is how societies manage to enforce cooperative behavior in social dilemmas such as public goods provision or bilateral trade. According to an influential body of theories in psychology, anthropology, and evolutionary biology, the answer is that humans...

Throughout the Western world, people's policy views are correlated across domains in a strikingly similar fashion. This paper proposes that what partly explains the structure of ideology is moral universalism: the extent to which people's altruism and trust remain constant as social distance...