Anthropologists study kinship because it is arguably one of the most basic components of culture. In all societies, kinship is pervasive and, given sufficient population levels, it is also complex. The study of kinship allows anthropologists to understand an individual's identity and actions. Consanguineous relationship is based on relatives who are related by blood. For example, an individual's brother or child is his or her blood relative. In “Polyandry: When Brothers Take a Wife,” by Melvyn C. Goldstein and in “Complexities: Beyond Nature & Nurture,” by Susan McKinnon, blood kinship is examined and analyzed in different cultures. In “Complexities: Beyond Nature & Nurture,” the author states that over time, social scientists have “layered accounts of human psychology.” (McKinnon 106) This explains the “contemporary forms of kinship” in different cultures. (McKinnon 107) Mckinnon argues that consanguineous kinship is the strongest and closest degree of kinship. This directly influences kinship behavior, which results in “higher altruistic behavior.” (McKinnon 107) McKin...