what was the major effect of the 1857 Dred scott vs. sandford decision

Dred Scott decision, formally Dred Scott v. John F. A. Sandford, legal case in which the U. S. Supreme Court on March 6, 1857, ruled (7-2) that a slave (Dred Scott) who had resided in a free state and territory (where slavery was prohibited) was not thereby entitled to his freedom; that African Americans were not and could never be citizens of the United States; and that the Missouri Compromise (1820), which had declared free all territories west of Missouri and north of latitude 36°30′, was unconstitutional. The decision added fuel to the sectional controversy and pushed the country closer to civil war.

Among constitutional scholars, Scott v. Sandford is widely considered the worst decision ever rendered by the Supreme Court. It has been cited in particular as the most egregious example in the court’s history of wrongly imposing a judicial solution on a political problem. A later chief justice, Charles Evans Hughes, famously characterized the decision as the court’s great "self-inflicted wound."