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In 1820, politicians debated the question of whether slavery would be legal in the western territories. The Missouri Compromise permitted slavery in the new state of Missouri and the Arkansas Territory but it was barred everywhere west and north of Missouri.
closed to slavery
Slavery was not permitted in the Ohio territory. The Northwest Ordinance of 1787, which established the Northwest Territory, including what would become Ohio, prohibited slavery in the region.
That would be the Kansas Territory.
settlers would determine whether a territory would have slavery.
Under popular sovereignty, the residents of the territory would ultimately decide whether slavery would be allowed. This principle meant that the people living in a particular territory would determine their own laws and institutions, including the decision on the legality of slavery.
The Kansas-Nebraska Act allowed people in certain areas to determine whether or not their territory would allow slavery
Under popular sovereignty, the decision on whether slavery would be allowed in a territory is typically made by the residents of that territory through a vote or referendum. This allows the people living in the area to determine the status of slavery based on majority rule.
Popular sovereignty is the term that refers to the idea that settlers had the right to decide whether slavery would be legal in a territory.
It also said that slavery would not be allowed in states formed from the Northwest Territory.
Wilmot Proviso