He studies culture change and how cultural factors and social institutions affect the health of individuals and societies. His current projects focus on the co-evolution of institutions and helping behavior, the influence of culture on health-seeking in Bangladesh, and the development and testing of formal models of culture change. Hruschka’s work has been published in Trends in Cognitive Sciences, Journal of Theoretical Biology, Journal of Epidemiology and Community Health, Ethos and Annals of Human Biology. He is author of the forthcoming book, Friendship: Development, Ecology, and Evolution of a Social Relationship (University of California Press). Before coming to ASU, Hruschka was a postdoctoral fellow at the Santa Fe Institute.