Samuel Bowles heads the Behavioral Sciences Program at the Santa Fe Institute. He previously taught economics at Harvard University, the University of Massachusetts and the University of Siena. He is the author, most recently, of Microeconomics: Behavior, Institutions, and Evolution (2004), A Cooperative Species: Human Reciprocity and its Evolution (2011, with Herbert Gintis) and articles in Science, Nature, the Quarterly Journal of Economics, the Journal of Public Economics and other academic journals. He has also served as an economic advisor to presidential candidates Robert F. Kennedy and