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L.H Morgan

A social evolution considered that technological growth and social evolution are related to each other. His classification for the social evolution can be given as

Savagery	Barbarism	Civilization
Upper-instrumental Development Bow and Arrow	Upper-Discovery of iron	Use of phonetic language and script
Middle- Fire and fishing	Middle - Domestication of animals and Agriculture
Lower-Substence on print	Lower- Development of pottery

Marriage and family

Deeply influenced Engels and has writing based on the major anthropological work Iroquois of Polynesia. The different stages stated are:

Stage		Characteristics
Agamy		Marriage Less And Indifferent Towards Sex
Primitive Promiscuity		Without Restrictions And No Taboo Regarding Incest
Consanguine Family		Same Generation Marriage Between Brother And Sister
Punalvant Family		Group Marriage Between Men And Women With One Male Group Having Sexual Relation With Any Female
Syndasmian		Marriage Between Two Opposite Sex, But Freedom To Male To Have Relation With Any Female.
Patriarchal		Male Dominance Over Female
Monogamous Family		Present Stage Of Marriage

Descriptive And Classificatory Terminology

Morgan has given single term for specific individual's relation which is characterized by firstly divergence is kept in linear relationship and collateral relationship are distinguished secondly the term also describe blood relationship.

Important Books:

• System of consanguinity and affinity of the human family (1870)
• Ancient society (1877)