Guinn v. United States
This page analyzes a single policy using structured scoring, historical evidence, source quality, and measurable outcomes.
Summary
The Supreme Court struck down grandfather clauses that were used to block Black Americans from voting.
How to Read This Record
Impact Reading
Very high documented impact
Evidence Base
Limited evidence from Government sources.
Data Completeness
Good record with 1 source and 1 metric.
Outcome Summary
Temporarily expanded voting rights, though states later adopted new suppression tactics.
Categories
Impact Scores
This score is a structured measure of how directly and materially this policy affected Black communities, weighted by evidence, durability, and equity. Harm offset reduces the total score.
Total Impact Score
28
Directness
4
How explicitly the policy targeted or affected Black communities.
Material Impact
3
The practical real-world effect on conditions, rights, or outcomes.
Evidence
4
Strength of sourcing and historical support for the assessment.
Durability
2
How lasting the effects of the policy were over time.
Equity
4
Whether the policy advanced fairness, inclusion, or equal access.
Harm Offset
0
Any offsetting harms, limitations, exclusions, or contradictory effects that reduce the total.
Scoring Notes: Helpful ruling with limited long-term durability.
Metrics
Legality of grandfather clauses in voting law
Black voters in affected states • United States
Before
1.00
1914 • binary
After
0.00
1915 • binary
Methodology: Represents Supreme Court invalidation of grandfather clauses used to suppress Black voting.
Suggested Relationships
These policies may be related based on shared categories, era, and proximity in time.
1927 • Court Case • Unknown party
Jim Crow and Disenfranchisement • Positive
Shared Categories: 1 • Year Distance: 12
1903 • Court Case • Unknown party
Jim Crow and Disenfranchisement • Negative
Shared Categories: 1 • Year Distance: 12
1898 • Court Case • Unknown party
Jim Crow and Disenfranchisement • Negative
Shared Categories: 1 • Year Distance: 17
1935 • Court Case • Unknown party
Jim Crow and Disenfranchisement • Negative
Shared Categories: 1 • Year Distance: 20
1939 • Court Case • Unknown party
Jim Crow and Disenfranchisement • Positive
Shared Categories: 1 • Year Distance: 24
1944 • Court Case • Unknown party
Civil Rights Era • Positive
Shared Categories: 1 • Year Distance: 29