Plural of collectivity; multiple groups or instances of people united by shared interests, purposes, or characteristics.
From collectivity (collective + -ity) plus the plural -ies. Collectivity emerged as a formal term in 19th-century sociology to describe social units beyond individuals.
Sociologists distinguish between different types of collectivities—some are organized (corporations, clubs) while others form spontaneously (crowds, fan bases)—and they behave completely differently.
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