A dual inheritance model of the human evolutionary process I: Basic postulates and a simple model

摘要: Human evolution presents special problems for Neo-Darwinian theory because a second system of inheritance, culture, is an important determinant phenotype in our species. An elementary to explain how cultural inheritance affects the evolutionary process developed from three basic postulates: (1) both genes and culture evolve by natural selection; (2) reproductive fitness optimum as function different rules two systems are different; (3) genetic capacity assumed be optimized selection with respect fitness. The formally two-person variable sum game which compete control phenotype, although conservatively capacity-for-culture assumption ensures that will benefit genotype. Simple mathematical models used deduce general properties equilibrium phenotypes. Results include possibility under some circumstances may at rather than optimum. Particularly if it trait permitting many specific ones, like pleiotropic gene traits likely fact majority human societies, people bias their kinship behavior ways unexpected degree relatedness example effect on culture.