Daniel Rubenstein is the Class of 1877 Professor of Zoology and professor of ecology and evolutionary biology at Princeton University. His research focuses on how environmental variation and individual differences shape social behavior, social structure, sex roles and the ecological dynamics of animal populations. He has special interests in all species of wild horses, zebras and asses, and has done fieldwork on them throughout the world identifying rules governing decision-making, the emergence of complex behavioral patterns, and how these understandings influence their management and conservation. In Kenya, Rubenstein also works with pastoralist herding communities to assess impacts of various grazing strategies on rangeland quality, wildlife and livestock use, and human livelihoods. He engages people as "citizen scientists" to gather data on the population dynamics of the endangered Grevy’s zebra and has recently extended his work to measuring the effects of environmental change, including issues pertaining to managing the global commons and changes wrought by global warming, on animal behavior.