The kansas nebraska act ;)
The Act served to repeal the Missouri Compromise of 1820 which prohibited slavery north of latitude 36°30´.
Compromise of 1850.
Kansas-Nebraska act
The Kansas-Nebraska Act of 1854 effectively overturned the Missouri Compromise of 1820. The Missouri Compromise had prohibited slavery in the northern part of the Louisiana Purchase, specifically north of the 36°30′ parallel. By allowing settlers in Kansas and Nebraska to decide whether to allow slavery through popular sovereignty, the Kansas-Nebraska Act nullified the restrictions set by the Missouri Compromise.
Slaves
Kansas and Nebraska
Kansas and Nebraska were created after the Kansas-Nebraska Act of 1854. The reason for this Act was to open new farmland and create a Transcontinental Railroad.
Stephan A. Douglas proposed the Kansas Nebraska Act in 1854.
The Missouri Compromise was effectively ended by the Kansas-Nebraska Act, however since there was still turmoil as to the "Bleeding Kansas" dispute, it was thought that the Kansas-Nebraska Act would be shortly overturned. The Dred Scott decision by the Supreme Court further strengthened the elimination of the Missouri Compromise and the institution of slavery north of the Mason-Dixon Line by ruling that slaves were not able to take cases to court.
The Kansas-Nebraska Act of 1854 called for "popular sovereignty."
Stephen Douglas