The suggestion that all cultures progress through a similar set of stages is no longer accepted in contemporary anthropology. This theory was known as unilineal cultural evolution.
Early anthropological theory was largely concerned with the classification of cultures and peoples along static, evolutionary timelines, rising from barbaric and finally to civilizations typical of European societies of the time. Unilinear cultural evolution is a late nineteenth-century theory of evolution that postulates that all human societies evolved along a common path from simple hunter-gatherer societies to sophisticated civilizations. In doing so, all societies will go through the same basic set of steps, although the speed of transition may differ. Reflections of such thinking can be found in the three-year system and in anthropologically-based schema that identify bands, tribes, and chiefdom as a series of stages.
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