Chris von Rueden is a cultural anthropologist whose research focuses on male status hierarchy in small-scale societies, including investigation of (1) how status is acquired over the life-course, (2) the reproductive and health consequences of status, (3) the role of leadership in solving collective action problems, and (4) the socio-ecological determinants of increases in status inequality. This work has been supported by the National Science Foundation and has involved fieldwork with theTsimane forager-horticulturalists of lowland Bolivia, in collaboration with the Tsimane Health and Life History Project directed by Michael Gurven.