the other approach, that of evolutionary psychology, continues to take the view that genetic relatedness (or genealogy) is key to understanding human kinship patterns. in contrast to sahlin's position (above), daly and wilson argue that "the categories of 'near' and 'distant' do not 'vary independently of consanguinal distance', not in any society on earth." (daly et al. 1997, p282). a current view is that humans have an inborn but culturally affected system for detecting certain forms of genetic relatedness. one important factor for sibling detection, especially relevant for older siblings, is that if an infant and one's mother are seen to care for the infant, then the infant and oneself are assumed to be related. another factor, especially important for younger siblings who cannot use the first method, is that persons who grew up together see one another as related. yet another may be genetic detection based on the major histocompatibility complex (see major histocompatibility complex and sexual selection). this kinship detection system in turn affects other genetic predispositions such as the incest taboo and a tendency for altruism towards relatives.