Studies amon the Oksapmin of Papua New Guinea. An investigation of the thought of primitive children with special reference to animism. Folkbiological universals as common sense. Natural and human sources of cross-cultural agreement in ornithological classification. Supernatural beliefs, natural kinds, and conceptual structure.
Animals are good to think and good to prohibit.
Primitive religious thought and the evolution of religion. The perception of social conventionality by children and adults. Korean children's conceptions of moral and conventional transgressions. Moral development in comparitive cultural perspective. Evidence for a universal conception of mind.