Distinguish between : Affinal kin and Consanguineous kin. (2012)
Kinship rests on two principles. Consanguinity is relatedness through socially recognised common descent; affinity is relatedness created by marriage. Every kin universe, from a household to a caste-wide biradari, combines the two, which makes the distinction analytic rather than descriptive.
Criteria-wise contrast
| Criterion | Consanguineous kin | Affinal kin |
|---|---|---|
| Basis of tie | Socially recognised descent; ascribed at birth | Marriage; achieved through a jural or ritual act |
| Permanence | Irrevocable: a brother cannot be unmade | Revocable; divorce or widowhood transforms it |
| Terminology | Marked by lineality and generation; chacha, bua, mausi keep the paternal and maternal sides distinct | Marked as in-law: sasur, devar, nanad, samdhi; Dravidian terms merge some affines with cross-kin |
| Rights and obligations | Inheritance, gotra membership, ritual duty (pinda-dan), the marriage prohibition itself | Dowry or bride-price, hospitality, festival gifting, obligations between wife-givers and wife-takers |
| Examples | Father, sister, gotra and kul members, sapinda relations | Spouse, parents-in-law, devar, samdhi, the sasural |
| Significance | Reproduces the descent group and its property | Creates alliance, producing society beyond the group |
What the distinction reveals
- Degrees of kin. George Peter Murdock graded kin as primary (parents, siblings, spouse, children), secondary (primary kin of primary kin) and tertiary. The spouse is a primary affine: the two categories are cross-cutting axes, not two lists.
- Descent theory against alliance theory. For Meyer Fortes and A. R. Radcliffe-Brown the consanguineal group is the building block and marriage merely recruits to it; for Claude Lévi-Strauss and, in India, Louis Dumont, the affinal tie is the structure, since groups exist in order to exchange women.
- The Indian test. In north India kanyadan is an unreturnable gift that leaves wife-givers permanently inferior; affines stay separate and ranked, and the bride is severed from natal kin. In south India, on Dumont’s argument, repeated cross-cousin marriage makes affinity inherited, so today’s affines are yesterday’s consanguines and the categories collapse into each other over generations. The distinction does different structural work in each zone.
The distinction in Indian law
Consanguinity is translated directly into statute. The Hindu Marriage Act 1955, s.3(f), defines sapinda as five degrees of ascent through the father and three through the mother, and s.5(v) voids marriage within that range unless custom permits — the clause that lets a Tamil man marry his mother’s brother’s daughter. The Delhi High Court upheld the prohibition in Neetu Grover v. Union of India (2024).
Conclusion
Consanguinity gives kinship its continuity, affinity its reach. No society can run on descent alone: the incest taboo forces every consanguineal group to convert strangers into affines, and it is that conversion, not blood, that makes kinship social.