Reputation and reciprocity are key mechanisms for cooperation in human societies, often
going hand in hand to favor prosocial behavior over selfish actions. Here we review recent …

Prevalence of cooperation within groups of selfish individuals is puzzling in that it contradicts
with the basic premise of natural selection. Favoring players with higher fitness, the latter is …

Direct and indirect reciprocity are key mechanisms for the evolution of cooperation. Direct
reciprocity means that individuals use their own experience to decide whether to cooperate …

Human cooperation is an evolutionary puzzle. Unlike other creatures, people frequently
cooperate with genetically unrelated strangers, often in large groups, with people they will …

Ingroup favouritism–the tendency to favour members of one's own group over those in other
groups–is well documented, but the mechanisms driving this behavior are not well …

Darwinian evolution has to provide an explanation for cooperative behaviour. Theories of
cooperation are based on kin selection (dependent on genetic relatedness),, group …

Natural selection is conventionally assumed to favour the strong and selfish who maximize
their own resources at the expense of others. But many biological systems, and especially …

Why should we avoid doing moral wrong? The inability of philosophy to answer this
question in a compelling manner—along with the moral skepticism and ethical confusion …

Moral psychology is a rapidly growing field with two principle lineages. The main line began
with Jean Piaget and includes developmental psychologists who have studied the …

Theoretical models suggest that social networks influence the evolution of cooperation, but
to date there have been few experimental studies. Observational data suggest that a wide …