Sociality has profound evolutionary roots and is observed from unicellular organisms to
multicellular animals. In line with the view that social principles apply across levels of …

Primate individuals use a variety of strategies in intergroup encounters, from aggression to
tolerance; however, recent focus on the evolution of either warfare or peace has come at the …

Cooperation beyond familial and group boundaries is core to the functioning of human
societies, yet its evolution remains unclear. To address this, we examined grooming …

Prosocial behavior, in particular helping others in need, occurs preferentially in response to
distress of one's own group members. In order to explore the neural mechanisms promoting …

In social-living animals, interactions between groups are frequently agonistic, but they can
also be tolerant and even cooperative. Intergroup tolerance and cooperation are regarded …

We review the literature on various approaches to modeling animal intergroup conflict
behavior in theoretical biology, highlight the intricacies emerging in the process of adding …

Although uniquely destructive and wasteful, intergroup conflict and warfare are not confined
to humans. They are seen across a range of group-living species, from social insects, fishes …

Archaeological evidence suggests that important shifts were taking place in the character of
human social behaviours 300,000 to 30,000 years ago. New artefact types appear and are …

The COVID-19 pandemic has brought science into the public eye and to the attention of
governments more than ever before. Much of this attention is on work in epidemiology …

Sociality is widespread among animals, and involves complex relationships within and
between social groups. While intragroup interactions are often cooperative, intergroup …