Thank you for asking. The ruling by the Supreme Court was later reversed when Congress created laws against slavery.
Dred Scott decision, legal case in which the
U.S. Supreme Court on
March 6, 1857, ruled (7–2) that a slave (
Dred Scott) who had resided in a free state and territory (where
slavery was prohibited) was not thereby entitled to his freedom; that
African Americans were not and could never be citizens of the United States; and that the
Missouri Compromise (1820), which had declared free all territories west of Missouri and north of latitude 36°30′, was unconstitutional. The decision added fuel to the sectional controversy and pushed the country closer to civil war.
The 13th Amendment was passed at the end of the Civil War before the Southern states had been restored to the Union, and should have easily passed in Congress. However, though the Senate passed it in April 1864, the House initially did not. At that point, Lincoln took an active role to ensure passage through Congress. He insisted that passage of the 13th Amendment be added to the Republican Party platform for the upcoming 1864 Presidential election. His efforts met with success when the House passed the bill in January 1865 with a vote of 119–56.
On February 1, 1865, President Abraham Lincoln approved the Joint Resolution of Congress submitting the proposed amendment to the state legislatures. The necessary number of states (three-fourths) ratified it by December 6, 1865. The 13th Amendment to the United States Constitution provides that "Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction."
With the adoption of the 13th Amendment, the United States found a final constitutional solution to the issue of slavery. The 13th Amendment, along with the
14th and
15th, is one of the trio of Civil War amendments that greatly expanded the civil rights of Americans.