The term 'Historical Slave Scott' refers to Dred Scott, an African-American man who was enslaved in the United States during the mid-19th century. He is most famous for his legal case, Dred Scott v. Sandford, which was decided by the Supreme Court in 1857. In this case, Scott argued that he should be granted his freedom because he had lived in a free state and territory. The Supreme Court ruled against him, declaring that African-Americans were not citizens and could not sue in federal court. This ruling was a major setback for the abolitionist movement and helped to further divide the nation on the issue of slavery.