The New York Times Magazine has a long article on the colorful author of The Fierce People [1]:
How Napoleon Chagnon Became Our Most Controversial Anthropologist [2]
I wrote about the role of personality in cultural anthropology last fall [3].
Perhaps anthropologists who become interested in Darwinian perspectives tend to be more masculine than those anthropologists who eschew Darwin in favor of Marx, Freud, Levi-Strauss, Gimbutas [4], or whomever? Besides Chagnon, I'd mention Robin Fox, Henry Harpending [5], and Carleton Coon. A delight in hunting might be a common denominator. (Darwin, himself, was an obsessive hunter when young, as was his cousin Galton.)
In general, the Darwinian tradition owes a lot to smart country boys, as I pointed out in a review of Edward O. Wilson's novel, Anthill [6]. In contrast, Darwinism tends to strike urban intellectuals as suspicious, probably unnatural.
Links:
[1] http://www.amazon.com/Yanomamo-Fierce-Studies-Cultural-Anthropology/dp/0030623286/?_encoding=UTF8&camp=1789&creative=9325&linkCode=ur2&tag=vd0b-20
[2] http://www.nytimes.com/2013/02/17/magazine/napoleon-chagnon-americas-most-controversial-anthropologist.html?pagewanted=all#comments
[3] http://isteve.blogspot.com/2012/10/who-was-right-about-human-nature-ayn.html
[4] http://en.wikipedia.org/wiki/Marija_Gimbutas
[5] http://isteve.blogspot.com/2009/01/henry-harpending-on-how-not-to-hunt.html
[6] http://takimag.com/article/country_boys_and_conservative_conservation/#axzz2KqZJEq00