estratificación
= stratification, layering.
Ex: They believed in the "inevitability of stratification, necessity of aristocracy, importance of religion and morality, sanctity of property, unwisdom of majority rule, urgency of constitutionalism, and folly of all attempts at social and economic leveling".
Ex: The organisation of the data base is based on the same layering concept.
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* estratificación social = social stratification.