one-drop rule

The one-drop rule is a historical colloquial term for a belief among some people in the United States that a person with any trace of African ancestry is black.

See also: hypodescent.


For more information, see Winthrop D. Jordan’s (Paul Spickard, ed.) “Historical Origins of the One-Drop Racial Rule in the United States,” in the Journal of Critical Mixed Race Studies (Volume 1, Issue 1, 2014).

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