Haig, David. 2008. Kinship asymmetries and the divided self. Behavioral and Brain Sciences 31(03): 271-272.
Imprinted genes are predicted to affect interactions among relatives. Therefore, variant alleles at imprinted loci are promising candidates for playing a causal role in disorders of social behavior. The effects of imprinted genes evolved in the context of patterns of asymmetric relatedness that existed within social groups of our ancestors.