For over 25 years, primatologists have speculated that intelligence, at least in monkeys and apes, evolved as an adaptation to the complicated social milieu of

The scientific study of networks - computer, social, and biological - has received an enormous amount of interest in recent years. However, the network approach

Copying rituals has allowed cultural groups to proliferate over time. Rare, traumatic rituals produce strong cohesion in small relational groups, whereas daily/

Social network analysis is used widely in the social sciences to study interactions among people, groups, and organizations, yet until now there has been no boo

Darwin famously described special difficulties in explaining social evolution in insects. More than a century later, the evolution of sociality - defined broadl