Descent: tracing who belongs
Descent rules decide which relatives you belong with: whose name you carry, what you inherit, and which group you call your own.
Unilineal descent
In patrilineal descent, membership passes through the father's line; in matrilineal descent, through the mother's line. In a matrilineal society, a man's heirs may be his sister's children rather than his own. Lineages are groups that can trace their exact links to a common ancestor; clans claim a shared ancestor, sometimes legendary, without tracing every link.
Bilateral and ambilineal descent
Bilateral descent traces relatives equally through both parents, as in most of North America and Europe. Ambilineal descent lets a person choose to affiliate with either the mother's or father's group. Each system creates different kinds of social groups and loyalties.
Worked example: inheritance
Imagine a farm passed down for generations. Under patrilineal rules it goes to a son. Under matrilineal rules it may go to a man's sister's son, keeping the farm within the mother's line. Under bilateral rules, all children might share it. The same family land can follow very different paths depending on the descent system.
Flashcard
Group membership traced through the father's line
Check your understanding
In a society where children belong to their mother's clan and inherit from their mother's brother, descent is: