How did the Kansas nebraska act affect the Missouri compromise
The Kansas-Nebraska Act of 1854 essentially repealed the Missouri Compromise of 1820, which had prohibited slavery in the territory north of the 36°30′ parallel within the Louisiana Territory. The Kansas-Nebraska Act allowed settlers in those territories to determine through popular sovereignty whether they would allow slavery, regardless of the geographical location.
This effectively invalidated the Missouri Compromise's restriction on slavery in certain territories and set the stage for increased tensions between pro-slavery and anti-slavery factions in the United States. The act contributed to the rise of the Republican Party, which was founded on opposition to the spread of slavery into new territories, and ultimately helped pave the way for the Civil War.