The Proviso prohibited the expansion of slavery into any territory acquired by the US from Mexico as a result of a settlement in the Mexico-American War. The proposed law was antislavery therefore benefiting the North, this further divided the North & South on the issue of slavery. Southerners believed that slavery should be legal all over the US while Northerners opposed slavery's expansion.
The Free Soil party was organized for the 1848 election to oppose further expansion of slavery in to the Western Territories. This organized party anti-slavery favoring the North, while the South further diverged from the North for they believed that slavery should be legal all over the US.
A series of was passed by the US Congress created when the New Land was added to the US after the Mexican-American War. The South gained by the strengthening of the Fugitive Slave Law, and the North gained a new free state, California. With the purpose of figuring out what to do with the land, tension built between the North & South as the 2 groups of states over the concept of slavery and Union.
The personal liberty laws were laws passed by several US states in the North to counter the Fugitive Slave Acts of 1793 and 1850. Different laws did this in different ways, including allowing jury trials for escaped slaves and forbidding state authorities from cooperating in their capture and return. Primarily helping the North, this further angered the South leading to upcoming events.
The Kansas - Nebraska Act allowed people in the territories of Kansas and Nebraska to decide for themselves whether or not to allow slavery within their borders. It allowed the opportunity of expanding slavery beyond the Southern States and took away from the North permitting expansion of slave states, dividing the nation.
Brooks beat Sumner with a cane on the floor of the US Senate in retaliation for an anti-slavery speech. The South benefited by showing the North how serious they were over the issue, the violence created a larger tension because of their disagreements.
A three horse race which led to the election of Buchanon, Republican candidate John C Fremon condemned the Kansas - Nebraska Act and crusaded against the Slave Power and the expansion of slavery. The North advanced from this election by advertising anti-slavery while the South was left more angered than ever.
The US Supreme Court issued a decision in the Dred Scott case, affirming the right of slave owners to take their slaves into the Western territories, there by negating the doctrine of popular sovereignty and severely undermining the platform of the newly created Republican Party. Only further dividing the two groups, the South had the most positive impact while the North continued their fight to abolish slavery for good.
John Brown led a small army of 18 men into the small town of Harpers Ferry, Virginia with the plan to instigate a major slave rebellion in the South. He had all intentions to help the North by showing the South just how far they will go to attain whats right which only angered the South more.
Abraham Lincoln was elected and when he won, several southern states seceded, so they could continue to have slavery be legal which eventually started the Civil War. The North, with Lincoln, will eventually end slavery all over the US demolishing the Southerns morals.