title: No evolution without genetic variation creator: Crusio, Wim E. subject: Sociobiology description: Dr. Thornhill's target article presents us with a number of hypotheses concerning rules regulating inbreeding in man. It is argued that the goal of such rules is not primarily the avoidance of close-kin inbreeding, because 'selection for the avoidance of close-kin mating has apparently resulted in a psychological mechanism which promotes voluntary incest avoidance'. date: 1991 type: Journal (Paginated) type: PeerReviewed format: text/html identifier: http://cogprints.org/167/1/bbsthorn.htm identifier: Crusio, Wim E. (1991) No evolution without genetic variation. [Journal (Paginated)] relation: http://cogprints.org/167/