The 13th Amendment to the United States Constitution, ratified in December 1865, abolished slavery and involuntary servitude, except as punishment for a crime. This amendment marked a significant turning point in American history by legally freeing all enslaved individuals and solidifying the principles of freedom and equality under the law. Its passage was a direct outcome of the Civil War and was heavily influenced by the Emancipation Proclamation, which had set the stage for this constitutional change.