The Dread Scott decision was important because it unleashed a storm of protest against the Court and the administration of President Buchanan, which supported the decision. The justices' plans to make a definitive ruling that would settle the controversy over slavery backfired as Republicans charged that a “Slave Power” conspiracy extended into the highest reaches of government. Violent struggles continued in the Kansas and Nebraska territories, where “free soil” and proslavery guerilla bands terrorized each other. A major landmark on the road to the Civil War, the Dread Scott decision was overturned with the adoption of the 13th and 14th amendments to the Constitution in 1865 and 1868. These amendments ended slavery and established firmly the citizenship of all persons, regardless of race, creed, or previous condition of servitude. As for Dread Scott, two months after the Supreme Court's decision, Emerson's widow sold Scott and his family to the Blow family, who freed them in May of 1857.
Clearly Scott v Sanford was not an easily forgotten case. That it still raised such strong emotions well into the Civil War shows that it helped bring on the war by hardening the positions of each side to the point where both were willing to fight over the issue of slavery. The North realized that if it did not act swiftly, the Southern states might take the precedent of the Scott case as a justification