Descent is the socially recognised rule by which a person derives membership of a group, together with a name, a place in a ritual order and a claim on property, from one or both parents. Filiation — the simple fact of being the child of particular parents — is universal; descent is the cultural elaboration that selects which filiative links shall count for the purpose of group formation. The distinction matters because descent, unlike filiation, produces groups that outlast individuals. A lineage recruits new members automatically at every birth, buries its dead, holds land and speaks with one voice in disputes.
Descent should also be kept apart from inheritance and succession, with which examiners often conflate it. Descent assigns membership; inheritance transmits property; succession transmits office or status. The three usually travel together but not always: a patrilineal group may allow a daughter a share in movables, and a matrilineal group may vest authority in men while transmitting membership through women.
Unilineal descent and its alternatives
Unilineal descent traces membership through one sex only. In patrilineal systems a child belongs to the father's group, as among the Nuer of the Sudan, the Chinese lineage or most Hindu, Muslim and Sikh communities of north India. In matrilineal systems membership passes through the mother, as among the Trobrianders, the Ashanti, the Khasi and the Nayar. Unilineal rules are favoured by comparative sociology because they are unambiguous: every person has exactly one group, and group boundaries never overlap.
The alternatives sacrifice that clarity for flexibility. Bilateral or cognatic reckoning traces relationships through both parents, producing a personal kindred — a network centred on the individual rather than a bounded group — which is why modern urban families cannot form lineages. Ambilineal systems let each person or household choose an affiliation. Double or duolineal descent assigns different things through different lines: the Yakö of Nigeria transmit land patrilineally and movable wealth matrilineally, and comparable splits appear in India where cult and gotra pass through the father while some ritual duties follow the mother's line. Parallel descent, in which sons follow the father and daughters the mother, is rare but demonstrates that the possible combinations are not exhausted by the familiar two.
Lineage, clan and gotra
The terminology of descent groups is a matter of genealogical depth and demonstrability. A lineage is a group whose members can trace their common descent step by step from a known ancestor; it is therefore of limited size and capable of acting together. A clan or sib is larger and its common ancestry is stipulated rather than demonstrated — often traced to a founder, a totem or a mythical progenitor. Clans typically regulate marriage without owning property; lineages typically own property and manage disputes. Phratries group clans, and a moiety divides a society exhaustively into two.
In India the gotra functions as an exogamous clan: members claim descent from a common sage, cannot ordinarily marry one another, and share ritual observances, while the effective corporate unit is the smaller local lineage, variously the kul, vansh, khandan or taravad. Evans-Pritchard's account of Nuer segmentary organisation supplies the classic model of how such groups nest: lineages divide and combine at different levels according to the scale of the dispute, a logic Indian sociologists have recognised in the way village lineages and khaps align in factional politics.
Corporate descent groups and the descent theory debate
For A. R. Radcliffe-Brown and, more systematically, Meyer Fortes, the importance of unilineal descent lay in its capacity to create corporate groups — jural persons that hold estate in common, persist through time, act as single units in law and politics, and mediate between the individual and society. Fortes distinguished the domestic domain, where relations are affective and shifting, from the politico-jural domain, where descent groups do their work.
Descent theory's difficulty was the residue: if a person belongs wholly to one line, why do ties through the other parent matter so much in practice? Fortes answered with complementary filiation — the recognition that the non-lineal parent's kin supply affection, refuge and certain claims without conferring membership. The mother's brother in a patrilineal society is the standing example. Critics, principally Lévi-Strauss and the alliance theorists, replied that this concession admitted the point: marriage and affinity are not residual at all but constitutive of the system.
Matriliny in India
India retains several matrilineal systems, and they are instructive precisely because they are not simple inversions of patriliny. The Nayar of Kerala organised the taravad, a joint estate of a woman, her siblings and her children, managed by the eldest male, the karanavan; husbands visited rather than resided, and the ritual tali rite created status rather than a household. The Khasi of Meghalaya vest property in the youngest daughter, the khadduh, while the mother's brother exercises authority; the Garo transmit through daughters but install a son-in-law, the nokrom, in the managing role. Muslim communities of Lakshadweep, studied by Leela Dube, combine matrilineal descent and residence with Islamic law and doctrine.
Dube's central corrective is that matriliny is not matriarchy. Descent and residence may favour women — securing them a home they never have to leave, a claim on land, and the support of brothers — but managerial authority, ritual office and public representation typically remain with men. What matriliny alters is a woman's security and bargaining position, not the location of power.
Law, migration and the loosening of descent groups
Descent groups weaken when their corporate estate is dissolved. The Madras Marumakkathayam Act of 1932 permitted partition of the taravad; the Kerala Joint Hindu Family System (Abolition) Act of 1975 converted joint holdings into individual shares; and the Hindu Succession Act of 1956, amended in 2005 to make daughters coparceners by birth, has steadily replaced group ownership with individual entitlement. Land reform, salaried employment, migration and neolocal urban residence complete the process: once income is earned outside the patrimony and residence is chosen rather than inherited, the lineage retains identity, endogamy rules and ritual functions but loses its grip on livelihoods. Descent survives as a badge and a marriage circle long after it has ceased to be a property regime.
For the UPSC answer
Begin by separating descent from filiation, inheritance and succession — the distinction alone signals command of the topic. Present the forms in order (patrilineal, matrilineal, cognatic, double) and define lineage against clan by demonstrability rather than size. Use Fortes on corporate groups and complementary filiation as the theoretical spine, noting the alliance theorists' objection. For India, contrast north Indian gotra exogamy with Nayar, Khasi, Garo and Lakshadweep matriliny, and make Leela Dube's point explicitly that matriliny confers security on women without conferring authority; close with the statutory changes that have dissolved corporate estates.
References & further reading
- Evans-Pritchard, E. E. (1940). The Nuer. Oxford: Clarendon Press.
- Fortes, M. (1953). The Structure of Unilineal Descent Groups. American Anthropologist, 55(1).
- Schneider, D. M. and Gough, K. (eds.) (1961). Matrilineal Kinship. University of California Press.
- Karve, I. (1953). Kinship Organisation in India. Poona: Deccan College.
- Dube, L. (1969). Matriliny and Islam: Religion and Society in the Laccadives. Delhi: National Publishing House.
- Dube, L. (1997). Women and Kinship: Comparative Perspectives on Gender in South and South-East Asia. United Nations University Press.