title: Comment on Harpending's and Roger's model of intergroup selection.
authors.affiliation: Department of Biology, University of California, San Diego, La Jolla 92093.
authors.forename: M E
authors.initials: ME
authors.lastname: Gilpin
authors.forename: B L
authors.initials: BL
authors.lastname: Taylor
mesh_terms: D000533:Altruism; D008957:Models, Genetic; D012641:Selection, Genetic; D012919:Social Behavior