title: The burden of proof for a cultural group selection account.
abstract: Richerson et al. establish cultural group selection as a plausible force in human social evolution. However, they do not demonstrate its causal precedence for any trait, let alone its "essentialness." To do so, they must show that a particular group trait was caused by cultural transmission, and directly caused differences in group fitness.
authors: Department of Psychology,University of Guelph,Guelph,ON N1G 2W1,Canada.barclayp@uoguelph.cawww.patbarclay.com.
authors: Pat
authors: P
authors: Barclay
authors: Program in Evolution and Governance,One Earth Future,Broomfield,CO 80021.dbkrupp@saltlab.orghttp://www.saltlab.org.
authors: Daniel Brian
authors: DB
authors: Krupp
mesh_terms: D005075:Biological Evolution; D003468:Cultural Evolution; D006801:Humans; D012641:Selection, Genetic