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How did Lewis Henry Morgan distinguish classificatory kinship terms from descriptive kinship terms?
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Genealogy
Genealogical tree of the Richard and Abigail Lippincott family in America, constructed and published by Charles Lippincott, 1880.
In his seminal 1871 work, Systems of Consanguinity and Affinity of the Human Family, American ethnologist Lewis Henry Morgan established a foundational distinction between two types of kinship terminology:
- Classificatory systems: In these systems, collateral kinārelatives outside of an individual's direct line of descentāare grouped together with lineal kin under the same terminological labels. For example, in many such systems, a father and his brother are referred to by the same term.1
- Descriptive systems: These systems maintain a clear separation between lineal and collateral relatives. A distinct term is used for each specific relationship, ensuring that individuals such as a mother and her sister are not conflated, even if they share the same generation and sex.1
Morganās distinction was central to his study of how different societies organize social relationships, highlighting that kinship terms often reflect the specific social and economic structures of a culture rather than just biological relatedness.12