Human hyperculture appears to have been produced by the amplificationof the kind of normal culture shared by cetaceans and other animalsand presumably by our ancestors. Is there any possibility thatcetaceans could be subject to these amplifying processes, which mayinclude: sexual selection; within-group moral behavior; culling oflow- cultural-capacity individuals through predation orself-predation; and reciprocal positive feedback between culture andthe capacity for culture.