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

In this review, I propose a new framework for the psychological origins of human
cooperation that harnesses evolutionary theories about the two major problems posed by …

Humans are a puzzling species. On the one hand, we struggle to survive on our own in the
wild, often failing to overcome even basic challenges, like obtaining food, building shelters …

Recent studies have proposed that social norms play a key role in motivating human
cooperation and in explaining the unique scale and cultural diversity of our prosociality …

Humans are an exceptionally cooperative species, but there is substantial variation in the
extent of cooperation across societies. Understanding the sources of this variability may …

Contingent reciprocity is important in theories of the evolution of human cooperation, but it
has been very little studied in ontogeny. We gave 2-and 3-year-old children the opportunity …

Humans are a cooperative species, capable of altruism and the creation of shared norms
that ensure fairness in society. However, individuals with different educational, cultural …

Human culture relies on extensive use of social transmission, which must be integrated with
independently acquired (ie asocial) information for effective decision‐making. Formal …

Previous research has shown that the majority of 8-year-old children share valuable
resources equally with others, whereas 4-year-olds are more likely to favor themselves in …

Active resource transfer is a pervasive and distinctive feature of human sociality. We
hypothesized that humans possess an action schema of giving specific for representing …