Many social groups are made up of complex social networks in which each individual
associates with a distinct subset of its groupmates. If social groups become larger over time …

Hierarchy is an efficient way for a group to organize, but often goes along with inequality that
benefits leaders. To control despotic behaviour, followers can assess leaders' decisions by …

Recent work suggests that collective computation of social structure can minimize
uncertainty about the social and physical environment, facilitating adaptation. We explore …

Sociality exists in an extraordinary range of ecological settings. For individuals to accrue the
benefits associated with social interactions, they are required to maintain a degree of spatial …

In this article, we critically study whether social networks can explain the emergence of
cooperative behavior. We carry out an extensive simulation program in which we study the …

In various types of structured communities newcomers choose their interaction partners by
selecting a role-model and copying their social networks. Participants in these networks may …

Some of the most highly social animals-including elephants, and some primates, cetaceans,
and social carnivores-live in “fission-fusion” societies where social groups divide and re …

It has been widely accepted that the evolution of cooperation in social dilemmas is likely to
have simultaneous effects on different levels of networks—that is, overlapping networks. In …

Living in groups necessarily involves a certain amount of within-group competition for food.
Group members may have different motivations, implying the reaching of a consensus to …

We show that the resolution of social dilemmas in random graphs and scale-free networks is
facilitated by imitating not the strategy of better-performing players but, rather, their emotions …