Why was the Scott vs Sanford case important?

The Scott v. Sanford case, also known as the Dred Scott decision, was significant because it ruled that African Americans, whether free or enslaved, were not considered citizens and therefore could not sue in federal court. It also declared the Missouri Compromise unconstitutional, leading to heightened tensions over the issue of slavery and playing a significant role in the lead-up to the Civil War in the United States.