How do the rules of descent and alliance in kinship differ from each other? Illustrate. (2015)
Kinship rests on two principles: consanguinity, organised by rules of descent, and affinity, organised by rules of alliance (marriage). British structural-functionalists (A. R. Radcliffe-Brown, Meyer Fortes, E. E. Evans-Pritchard) treated descent as the core of social structure. Claude Lévi-Strauss (The Elementary Structures of Kinship, 1949) and Louis Dumont put alliance first.
Rules of descent
These rules recruit a person at birth into a group through a socially recognised line of ancestry:
- Patrilineal: the Nuer lineages; north Indian kul and gotra.
- Matrilineal: the Nayar taravad; Khasi clans.
- Double descent: the Yakö of Nigeria.
- Cognatic/bilateral: this produces personal kindreds rather than groups.
Descent rules settle group membership, inheritance and succession. Evans-Pritchard (The Nuer, 1940) showed that segmentary lineages maintain political order without a state.
Rules of alliance
These rules regulate whom one may or must marry, and so how groups are linked:
- Exogamy and endogamy: gotra exogamy combined with caste endogamy.
- Preferential and prescriptive marriage, for example with the mother’s brother’s daughter.
- Restricted exchange (two groups exchange women directly) versus generalised exchange (A gives to B, B to C, C to A).
- Hypergamy or isogamy, together with dowry or bride-price.
For Lévi-Strauss the incest taboo is a positive rule to marry out: exchanging women creates society.
Key differences
| Criterion | Descent | Alliance |
|---|---|---|
| Relationship | Consanguineal (parent–child, vertical) | Affinal (husband–wife, horizontal) |
| Function | Continuity of a group across generations | Links between groups within and across generations |
| What it regulates | Membership, property, office, ritual status | Choice of spouse, exchange, marriage payments |
| Acquired by | Birth, ascribed and fixed | Marriage, contracted and potentially renewable |
| Elementary unit | The unilineal descent group | The marriage exchange between groups |
| Theoretical school | Descent theory (Africa) | Alliance theory (South and Southeast Asia) |
Indian illustrations
- North India, where descent dominates: patrilineal gotras set the limits of exogamy, and hypergamy makes wife-givers inferior. Each marriage is a one-way transfer that is not repeated. Khap councils still police sagotra unions; in Shakti Vahini v. Union of India (2018) the Supreme Court held that their coercive interference with adult couples’ marriage choices is illegal.
- South India, where alliance dominates: Dumont (“Hierarchy and Marriage Alliance in South Indian Kinship”, 1957) showed that affinity is inherited. Cross-cousin marriage renews an existing alliance, and Dravidian terminology sorts relatives into “kin” and “affines” from birth. NFHS-5 (2019–21) puts consanguineous marriage at about 28% in Tamil Nadu, against about 11% nationally.
Interdependence
The two sets of rules are complementary:
- Exogamous descent groups need alliances, and alliances presuppose bounded groups.
- Fortes’s “complementary filiation” acknowledged the ties a child keeps with the non-descent parent’s side.
- Edmund Leach (Rethinking Anthropology, 1961) criticised both schools for treating kinship as a set of rules detached from property and politics.
Conclusion
Descent answers the question “who belongs?”; alliance answers “with whom do we exchange?” Indian kinship shows both at work, patrilineal descent framing gotra exogamy while alliance patterns vary from northern hypergamy to southern repeated exchange. A full analysis needs both principles together.