Napoleon A. Chagnon

Napoleon Alphonseau Chagnon (born 27 August 1938) is an American anthropologist, professor of anthropology at the University of Missouri in Columbia and member of the National Academy of Sciences. Chagnon is known for his long-term ethnographic field work among the Yanomamö, a society of indigenous tribal Amazonians, in which he used an evolutionary approach to understand social behavior in terms of genetic relatedness.