by The Supreme Court of the United States

The most famous example of judicial failure--the case referred to as "the most frequently overturned decision in history." On March 6, 1857, Chief Justice Roger B. Taney delivered the Supreme Court's decision against Dred Scott, a slave who maintained he had been emancipated as a result of having lived with his master in the free state of Illinois and in federal territory where slavery was forbidden by the Missouri Compromise. The decision did much more than resolve the fate of an elderly black man and his family: Dred Scott v. Sanford was the first instance in which the Supreme Court invalidated a major piece of federal legislation. The decision declared that Congress had no power to prohibit slavery in the federal territories, thereby striking a severe blow at the legitimacy of the emerging Republican party and intensifying the sectional conflict over slavery.