Final answer:
The Thirteenth Amendment was ratified in 1865, effectively abolishing slavery in the United States.
Explanation:
The Thirteenth Amendment, ratified in 1865, effectively abolished slavery in the United States except as a punishment for crimes. This amendment played a crucial role in granting freedom to four million individuals who were enslaved. The ratification of this amendment was a significant step in eradicating slavery and its remnants.
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