Humans are an ultrasocial species. This sociality, however, cannot be fully explained by the
canonical approaches found in evolutionary biology, psychology, or economics …

Reward and punishment change the payoff structures of social interactions and therefore
can potentially play a role in promoting prosocial behavior. Yet, there are boundary …

A scientist integrates evolutionary biology, genetics, psychology, economics, and more to
explore the development and workings of human societies.“There is no good reason why …

Abstract Morality-as-Cooperation (MAC) is the theory that morality is a collection of
biological and cultural solutions to the problems of cooperation recurrent in human social …

Across societies, humans punish norm violations. To date, research on the antecedents and
consequences of punishment has largely relied upon agent-based modeling and laboratory …

Multiple lines of evidence suggest that there are two major dimensions of social perception,
often called warmth and competence, and that warmth is prioritized over competence in …

Moralistic punishment can confer reputation benefits by signaling trustworthiness to
observers. However, why do people punish even when nobody is watching? We argue that …

A fundamental puzzle of human evolution is how we evolved to cooperate with genetically
unrelated strangers in transient interactions. Group-level selection on culturally differentiated …

Direct and indirect reciprocity are two fundamental mechanisms that promote prosocial
behavior within groups and across societies. Here, we review recent work that illustrates …

Humans are outstanding in their ability to cooperate with unrelated individuals, and
punishment–paying a cost to harm others–is thought to be a key supporting mechanism …