Dred Scott was a slave who sought his freedom through the American legal system. The 1857 decision by the United States Supreme Court in the Dred Scott case denied his plea, determining that no Negro, the term then used to describe anyone with African blood, was or could ever be a citizen. The decision also invalidated the Missouri Compromise of 1820, which had placed restrictions on slavery in certain U.S. territories. Northern abolitionists were outraged. The Dred Scott case became a rallying point for them and contributed to the election of Abraham Lincoln as president in
