stratification

This term describes the structural organization of a system into distinct, hierarchical levels. In a sociological sense, it carries a connotation of inequality and rigidity, suggesting a system where access to resources is determined by one's position in the social order.

In scientific contexts, the word evokes a visual image of stacked layers. Whether referring to geological rock formations or statistical sampling, the focus is on the deliberate or natural separation of a whole into specific, manageable, or identifiable strata.