History

Class structures existed in a simplified form in pre-agricultural societies, but they have evolved to be more intricate following the establishment of permanent agriculture-based civilizations with a food surplus.

Segregation into classes was accomplished through observable traits (such as race or profession) that were accorded varying statuses and privileges. Feudal classification systems might include merchant, serf, peasant, warrior, priestly, and noble classes. The established hierarchy varied greatly from community

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