 Several accounts of memetic replication have been proposed in the literature. Some consider that there is no replication in cultural evolution, but that memes are “attractor points” in culture (Atran 1998). Others consider that the interactor is the meme itself (Blackmore 1999) or that the meme is the selected cultural heritable information, just as Williams’ “evolutionary gene” is the selected genetic heritable information, and the memetic interactor is the repertoire of behaviors it elicits (Wilkins 1998). One view that has been offered several times is that memes are active neural structures (Aunger 1998, 2002; Delius 1991).