In his early research, Lewis Henry Morgan distinguished three basic forms of kinship structure commonly found across cultures. Today, we refer to these kinship forms as lineal, bifurcate merging, and generational kinship. Each one defines family and relatives a bit differently and so highlights different roles, rights, and responsibilities for these individuals. This means that depending on the kinship structure used by a society, EGO will refer to a different set of individuals as kindred and will have a different relationship with those individuals. Lineal kinship: Lineal kinship (initially referred to as Eskimo kinship) is a form of kinship reckoning (a way of mapping EGO to other individuals) that highlights the nuclear family. While kindred in a lineal system is traced through both EGO’s mother and father (a practice called bilateral descent), the kinship terminology clearly shows that the rights and responsibilities of the nuclear family far exceed those of other kindred. In effect, lineal kinship, associated frequently with North American and European societies, suggests a very small and nominal family with little power and influence across other social institutions. Figure 11.8 A lineal kinship diagram. Note the distinction of the nuclear family. (credit: “Eskimo Kinship Chart” by Fred the Oyster/Wikimedia Commons, CC0) On the lineal diagram (Figure 11.8), note the following: each of the members of the nuclear family have specific kinship terms, but bilateral kin (through both EGO’s mother and father) and collateral kin (EGO’s siblings and their offspring) are lumped together with similar terms. These relationships are not highlighted by individualized terms because there are minimal rights and responsibilities between EGO and kin outside of the nuclear family of orientation and procreation. Bifurcate merging kinship: Bifurcate merging kinship (initially referred to as Iroquois kinship) highlights a larger family of orientation for EGO by merging EGO’s parents’ same-sex siblings and their offspring into the immediate family (creating parallel cousins) and bifurcating, or cutting off, EGO’s parents’ opposite-sex siblings and their offspring (creating cross cousins). Figure 11.9 depicts bifurcate merging kinship with unilineal descent (either patrilineal or matrilineal). This means that once descent is introduced into the diagram, EGO’s relationships, with associated rights and responsibilities, will shift toward either the mother’s or father’s side. This form of kinship reckoning, quite common to tribal societies, is found extensively, and it creates a distinction between the family of orientation, which is merged together from various lines, and other relatives, who are bifurcated, or cut away. Figure 11.9 A bifurcate merging kinship diagram. Note the distinction between parallel and cross cousins. (credit: “Iroquois Kinship Chart” by Fred the Oyster/Wikimedia Commons, CC0) On the bifurcate merging diagram (Figure 11.9), note that the members of the family of orientation share kinship terms that indicate a close intimacy with EGO. As an example, while EGO knows who his biological mother is (the woman who gave birth to him), his relationship with his biological mother has the same rights and responsibilities as his relationship with his mother’s sister(s), etc. Notice also that the category of individuals lumped together as “cousins” under the lineal diagram are here distinguished depending on EGO’s relationship with their parent. EGO’s mother’s sisters are called “mother” and his father’s brothers are called “father,” which means that any of their offspring would be EGO’s brothers or sisters. Notice, though, that the mothers and fathers highlighted outside of EGO’s biological parents are married to non-kin members; EGO does not refer to his mother’s sister’s husband as father—he is referred to as “mother’s husband.” Mother’s brothers and father’s sisters produce offspring who are bifurcated and lumped as “cousin.” Anthropologists distinguish between parallel cousins (EGO’s brothers and sisters through his parents’ same-sex siblings) and cross cousins (EGO’s cousins through his parents’ opposite-sex siblings). In many tribal societies, EGO would choose his (or her) marriage partner from among his (or her) cross cousins, thereby merging their children back into a primary kinship line. In this way, the family unit (the kindred) maintains a stable and significant presence across generations. Generational kinship: Generational kinship (initially referred to as Hawaiian kinship) presents a very different case. Widespread in Polynesia, especially during the times of chiefdom societies, generational kinship provides a distinction in kinship terms only along gender and generational lines. Generational kinship has the least complicated kinship terminology of all kinship systems, but the impact of creating a family of orientation this large and powerful is immediately apparent. In reading this chart, it is obvious that the intimate family was as large as could be configured and it would have significant sociopolitical impact within the society. Figure 11.10 A generational kinship chart. Note the family of orientation, which is now at its maximal size. This graphically indicates the important role family has in all aspects of EGO’s life. (credit: “Hawaiian Kinship Chart” by Fred the Oyster/Wikimedia Commons, CC0)