RESTORED
Thornburg v. Gingles
478 U.S. 30 (1986) · 1986
The Court accepted Congress's answer: effects, not intent — and built the test that held for 39 years.
“The essence of a § 2 claim is that a certain electoral law, practice, or structure interacts with social and historical conditions to cause an inequality in the opportunities enjoyed by black and white voters to elect their preferred representatives.”
The Ruling
Unanimous in result. Justice Brennan upheld the 1982 Section 2 amendments and articulated the three-part 'Gingles preconditions' for vote-dilution claims: (1) the minority group is sufficiently large and geographically compact to constitute a majority in a single-member district; (2) the minority group is politically cohesive; (3) the white majority votes sufficiently as a bloc to usually defeat the minority's preferred candidate.
The Personhood Argument Not Made
Gingles operationalized political personhood as something measurable and provable in court. The test shifts the inquiry away from whether anyone consciously discriminated and onto whether the system, in operation, allows a minority's voice to register. For 39 years, this was the working definition of meaningful political personhood under federal law.
The Execution Gap Created
The Gingles framework was the single most productive civil rights doctrine of the late 20th century — the engine behind hundreds of redrawn districts and the rise from ~1,500 Black elected officials in 1980 to over 10,000 by the 2010s. Its overruling-by-stealth in Callais (2025) is what makes that ruling so consequential: the doctrinal floor itself was removed.
Primary sources & research
Related cases
Part of The Personhood Prism, the companion to The Execution Gap by Thomas William Hornig. See all personhood cases →