Darwinian anthropology describes an approach to anthropological analysis which employs various theories from Darwinian evolutionary biology. Whilst there are a number of areas of research that can come under this broad description (Marks, 2004) some specific research projects have been closely associated with the label. A prominent example is the project that developed in the mid 1970s with the goal of applying sociobiological perspectives to explain patterns of human social relationships, particularly kinship patterns across human cultures.
This kinship-focused Darwinian anthropology was a significant intellectual forebear of evolutionary psychology, and both draw on biological theories of the evolution of social behavior (in particular inclusive fitness theory) upon which the field of sociobiology was founded.
In 1974 the biologist Richard D. Alexander published an article The Evolution of Social Behavior which drew upon W.D.Hamilton's work on inclusive fitness and kin selection and noted that:
Although ten years have passed since Hamilton's landmark papers, apparently only a single social scientist (Campbell, 31) has made a distinct effort to incorporate kin selection into theories of human altruism... But so have the biologists, for one reason or another, failed to consider the enormous literature on topics like kinship systems and reciprocity in human behavior. (Alexander 1974, 326)
Amongst other suggestions, Alexander suggested that certain patterns of social cooperation documented by ethnographers, in particular the avunculate ('mother's brother') relationship, could be explained in reference to individuals pursuing a strategy of individual inclusive fitness maximization under conditions of low certainty-of-paternity. This hypothesis was subsequently taken up and elaborated in a series of studies by other Darwinian anthropologists:
The hypothesis follows that matrilineal inheritance is a cultural trait that evolved in response to low probability of paternity. [...
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Social Bonding and Nurture Kinship: Compatibility between Cultural and Biological Approaches is a book on human kinship and social behavior by Maximilian Holland, published in 2012. The work synthesizes the perspectives of evolutionary biology, psychology and sociocultural anthropology towards understanding human social bonding and cooperative behavior.
Kin selection is a process whereby natural selection favours a trait due to its positive effects on the reproductive success of an organism's relatives, even when at a cost to the organism's own survival and reproduction. Kin selection can lead to the evolution of altruistic behaviour. Kin selection is related to the concept of inclusive fitness, which combines the number of offspring produced with the number an individual can ensure the production of by supporting others (weighted by the relatedness between individuals).
In evolutionary biology, inclusive fitness is one of two metrics of evolutionary success as defined by W. D. Hamilton in 1964: Personal fitness is the number of offspring that an individual begets (regardless of who rescues/rears/supports them) Inclusive fitness is the number of offspring equivalents that an individual rears, rescues or otherwise supports through its behaviour (regardless of who begets them) An individual's own child, who carries one half of the individual's genes, is defined as one offspring equivalent.
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