Human coexistence depends on cooperation. Individuals have different motivations and reasons to collaborate, resulting in social dilemmas, such as the well-known prisoner's dilemma. Scientists now ...

Larger, more tolerant chimpanzee groups manage shared resources more effectively and exhibit less aggressive competition than smaller, more competitive groups. Tolerance functions as a group-level ...

If defection beats cooperation if the other player cooperates, and if defection also beats cooperation if the other player defects, then a player should defect even without knowing what the other ...

From school to work to everyday life, you’ve likely been part of groups that work together smoothly and others that quickly devolve into squabbling factions. But have you ever stopped to ask yourself ...