Publications and Outreach
Friendship: Development, Ecology and Evolution of a Relationship
University of California Press. 2010.
Friends are generous and cooperative with each other in ways that appear to defy standard evolutionary expectations, frequently sacrificing for one another without concern for past behaviours or future consequences. In this book, I tackle this apparent puzzle. Synthesizing an array of cross – cultural, experimental, and ethnographic data, I try to understand the broad meaning of friendship, how it develops, how it interfaces with kinship and romantic relationships, and how it differs from place to place. I argue that friendship is a special form of reciprocal altruism based not on tit – for – tat accounting or forward – looking rationality, but rather on mutual goodwill and knee – jerk altruism that is built up along the way in human relationships.
Choosing the Good
Choosing the Good, at the ASU Museum of Anthropology,
explores how people in different cultures make tough choices between the better
of two goods.
The museum exhibit presents our research on how people make tough choices
between loyalty and fairness in 8 field sites around the world. It is sponsored
by the New Science of Virtues project at University of Chicago and
the School of Human Evolution and Social Change.
Click for information about the exhibit and museum.
Check out coverage in the Arizona Republic.
Searching for the Origins of Collectivism
essay in This View of Life
used in Hackman and Hruschka 2013
Biocultural and social factors in health
Hruschka D. J., Hadley C., Brewis A. (2014) Disentangling basal and accumulated body mass for cross – population comparisons. American Journal of Physical Anthropology. 153:4, 542 – 550.
London D., Hruschka D. J., Helminths and human ancestral immune ecology: What is the evidence for high helminth loads among foragers? American Journal of Human Biology. 26:2, 124 – 29.
Hadley C., Hruschka D. J. (2014) Population level differences in adult body mass emerge in infancy and early childhood: Evidence from a global sample countries. American Journal of Physical Anthropology. 154:2, 232 – 238.
Hruschka D. J., Rush E., Brewis A. A. (2013). Accounting for population differences in the relationship between height, weight and fat mass: an application of Burton’s model. American Journal of Physical Anthropology. 151:1, 68 – 76.
Hruschka D. J., Brewis A. A. (2012). Absolute wealth and world region strongly predict overweight among women (ages 18 – 49) in 360 populations across 36 developing countries. Economics and Human Biology.
Hruschka D. J. (2012). Do economic constraints on food choice make people fat? A critical review of two hypotheses for the poverty &ndash obesity paradox. American Journal of Human Biology.
Hruschka D. J., Brewis A. A., Wutich A., Morin B. (2011). Social norms provide limited explanation for social contagion of obesity. American Journal of Public Health.101:S295 – S300
Kohrt B., Hruschka D. J., Kunz R. D., Baldwin J. L., Upadhaya N., Sharma V. D., Nepal M. K., Koirala S., Thapa S., Tol W. A., Jordans M., Rodkin N., Worthman C. M. (accepted). A Prospective Study of Mental Health during the People’s War in Nepal. British Journal of Psychology.
Rahman A., Moran A., Pervin J., Rahman M, Yeasmin M., Begum H., Rashid N., Yunus M., Hruschka D. J., Arifeen S., Streatfield P. K., Sibley L., Bhuiya A., Koblinsky M. (accepted). Effectiveness of an integrated approach to reduce perinatal mortality: Recent experiences from Matlab, Bangladesh. BMC Public Health.
Hruschka D. J. (2009). Culture as an explanation in population health. Annals of Human Biology. 36:3, 235 – 247.
Hruschka D. J. & Hadley C. (2008). A glossary of culture in epidemiology. Journal of Epidemiology and Community Health. 62:11, 947 – 51.
Cultural and social factors in cooperative behavior
Hruschka D. J., Hackman J. (in press). When are cross – group differences a product of a human behavioral immune system? Evolutionary Behavioral Sciences.
Hruschka D. J., Efferson C., Jiang T., Falletta – Cowden A.,Sigurdsson S., McNamara R., Sands M., Munira S., Slingerland E., and Henrich J. (2014). Impartial institutions, parasite stress and the expanding social network. Human Nature. 25:4.
Hruschka D. J., Henrich J. (2013). Economic and evolutionary hypotheses for cross – population variation in parochialism. Frontiers in Human Neuroscience. 7, 559.
Hruschka D. J., Henrich J. (2013). Institutions, parasites and the persistence of in – group preferences. PLOS ONE. 8:5, e63642.
Hackman J., Hruschka D. J. (2013). Fast life histories, not pathogens, account for U. S. state – level variation in homicide, maltreatment, family ties, and religiosity. Evolution and Human Behavior. 34:2, 118 – 124.
Hruschka D. J. (2010) Friendship: Development, Ecology and Evolution of a Social Relationship. University of California Press.
Hruschka D. J. (2009). Defining cultural competence in context: diversity in friendship norms among U. S. high school students. Ethos. 37:2, 205 – 224.
Hruschka D. J. & Henrich J. (2006). Friendship, cliquishness, and the emergence of cooperation. Journal of Theoretical Biology. 239, 1 – 15.