Napoleon Chagnon
Napoleon Alphonseau Chagnon (27 August 1938 – 21 September 2019) was an American cultural anthropologist, professor of sociocultural anthropology at the University of Missouri in Columbia and member of the National Academy of Sciences. Chagnon was known for his long-term ethnographic field work among the Yanomamö/Yanomami, a society of Indigenous tribal Amazonians, in which he used an evolutionary approach to understand social behavior in terms of genetic relatedness.