SARAH MATHEW is an evolutionary anthropologist interested in the origins of human ultrasociality and the role of culture in enabling it. She works on formal evolutionary models of cooperation and conducts fieldwork among acephalous Turkana herders in Kenya examining how tribal-scale societies maintain large-scale cooperation. She has done in-depth ethnographic work on Turkana raiding documenting how they solve the collective action problem in warfare. She is currently a postdoc at the Centre for the study of cultural evolution at Stockholm University.
Postdoctoral Researcher, Centre for the Study of Cultural Evolution, Stockholm University