Since Hamilton published his seminal papers in 1964, our understanding of the importance
of cooperation for life on Earth has evolved beyond recognition. Early research was focused …

Understanding how systems of political and economic inequality evolved from relatively
egalitarian origins has long been a focus of anthropological inquiry. Many hypotheses have …

We propose that networks of cooperation and allocation of social status co-emerge in
human groups. We substantiate this hypothesis with one of the first longitudinal studies of …

Network analysis provides a powerful tool to analyze complex influences of social and
ecological structures on community and household dynamics. Most network studies of social …

Women and girls cooperate with each other across many domains and at many scales.
However, much of this information is buried in the ethnographic record and has been …

Impersonal cooperation among strangers enables societies to create valuable public goods,
such as infrastructure, public services, and democracy. Several factors have been proposed …

Food sharing has been a central focus of research in human behavioral ecology and
anthropology more broadly. Studies of food sharing have typically focused on either the …

Social life is regulated by norms of fairness that constrain selfish behavior. While a
substantial body of scholarship on prosocial behavior has provided evidence of such norms …

As economic games have spread from experimental economics to other social sciences, so
too have critiques of their usefulness for drawing inferences about the 'real world'. What …

Acts of prosociality, such as donating to charity, are often analysed in a similar way to acts of
conspicuous advertising; both involve costly signals revealing hidden qualities that increase …