Moiety, Phratry, Clan, Lineage and Kinship Systems

Kinship refers to the web of social relationships formed by descent and marriage. It defines how individuals are connected to one another in society, dictating rights, obligations, and social interaction. Sociologists and anthropologists classify kinship groups based on the nature of common descent, group size, and internal structure.

Lineage

A lineage is a unilineal descent group whose members can trace their descent from a common known ancestor. The exact genealogical links between members are known.

• It is a compact group often acting as a unit in social, economic, and political matters.
• Membership is typically determined by birth.
• Lineages may be patrilineal (descent through males) or matrilineal (descent through females).

Clan

A clan is a group of people who claim common descent from an apical ancestor, who may be a human, animal, or mythical being.

• Unlike a lineage, the specific genealogical links to the common ancestor are often forgotten or symbolic.
• Clans are generally larger than lineages and are often exogamous, meaning members must marry outside the clan.
• The apical ancestor is often represented by a totem, which serves as a symbol of the clan’s unity.

Phratry

A phratry is a grouping of two or more clans that believe they share a common origin or have historical ties.

• It functions as a larger social unit than a clan.
• Phratries often perform collective rituals or participate in competitive social events.
• Membership in a phratry is usually hereditary.

Moiety

A moiety occurs when an entire society is divided into two distinct, exogamous groups.

• The term comes from the French word for half.
• Each half performs specific reciprocal roles for the other, such as officiating at funerals or marriage ceremonies.
• Every member of the society belongs to one of the two moieties, making this the most encompassing form of descent-based social organization.

Comparison of Social Groups

Types of Descent Systems

• Patrilineal: Descent and inheritance are traced through the father’s line.
• Matrilineal: Descent and inheritance are traced through the mother’s line.
• Bilateral (Cognatic): Descent is traced through both parents, common in many modern societies.
• Double Descent: A system where an individual belongs to a patrilineage for certain purposes and a matrilineage for others.

Kinship Terminology

Kinship systems use specific labels to categorize relatives.

• Classificatory System: This system groups different types of relatives under a single term. For example, the term mother may be applied to both the biological mother and the mother’s sisters.
• Descriptive System: This system uses separate, specific terms for different relatives, such as distinguishing between a father’s brother and a mother’s brother.

Factors Influencing Kinship

• Exogamy: The social rule requiring individuals to marry outside their own kinship group (e.g., outside the clan).
• Endogamy: The social rule requiring individuals to marry within their own group (e.g., within a caste or religious community).
• Incest Taboo: A universal cultural prohibition against sexual relations between close relatives, which enforces exogamy and encourages social alliances between different groups.
• Residence Rules: Patrilocal (couple lives with husband’s family), Matrilocal (couple lives with wife’s family), or Neolocal (couple establishes a new household).

Key Kinship Facts

• Kinship acts as a foundation for property inheritance. In patrilineal societies, ancestral land typically passes from father to son. In matrilineal societies, such as those found among the Khasi and Garo tribes of India, property and titles often pass through the female line.
• The concept of the totem is central to clan identity. A totem is a natural object, plant, or animal that acts as an emblem for the kin group. Members of the clan often treat the totem with reverence and may abstain from eating or killing the totem animal.

Kinship also defines the jural status of individuals. It determines who is responsible for an individual’s actions, who provides protection, and who shares in the inheritance of family debts or assets. While modern industrial societies rely less on kinship for political and economic stability compared to tribal societies, kinship remains a fundamental aspect of family law and social welfare in all cultures.