Final answer:
The Supreme Court's decision in Dred Scott v. Sandford found that Congress could not outlaw slavery in territories, nullifying the Missouri Compromise, and held that African Americans could not be considered citizens. This 1857 decision intensified sectional tensions and contributes to the historical debate over slavery and civil rights.
Step-by-step explanation:
The Dred Scott v. Sandford Supreme Court Decision
In the landmark case Dred Scott v. Sandford, the Supreme Court pronounced a decision that held significant implications for the issue of slavery in the United States. The opinion issued by Chief Justice Roger B. Taney in 1857 declared several key points:
- Dred Scott, an enslaved African American who had lived in free territories, was deemed to still be a slave upon his return to a slave state.
- The Court ruled that African Americans, free or enslaved, were not considered citizens and thus, Scott had no legal standing to sue in federal court.
- Key to your question, the Court also found that Congress lacked the authority to prohibit slavery in the territories, effectively nullifying the Missouri Compromise.
This decision played a critical role in escalating tensions leading up to the American Civil War, and its legacy remains a controversial chapter in the nation's history.