Noun
the condition of being arranged in social strata or classes within a group
Source: WordNetDomestication involved the initiation of production, vastly increased divisions of labor, and the completed foundations of social stratification. This amounted to an epochal mutation both in the character of human existence and its development, clouding the latter with ever more violence and work. John Zerzan
I think there's really strong social stratification in South Asia. Mohsin Hamid
The use of money results in social stratification and elitism based primarily on economic disparity. Jacque Fresco