The Cotton Gin was invented by Eli Whitney in 1793 for the purpose of removing seeds from the cotton fiber. Widespread use of this machine created a cash crop for the south and revived the institution of slavery. This increased the desire to keep slavery, as profits increased, helping cause the civil war.
We should prohibit slavery in this territory!
That's not smart!
The Missouri Compromise was passed in 1820 in effort to preserve the balance of power in congress between slave and free states. This prohibited slavery north of the 36 30 line. Others felt this made the north seem more aggressive in its anti-slavery views and contributed to southern resentment, which may have led to the civil war occurring sooner.
I have a few solutions to compromise.
We're okay.. for now
Nat Turner's Rebellion was a slave rebellion that took place in August of 1831, led by Nat Turner. Rebel slaves killed 55 to 65 people, at least 51 being white. This served as a "spark" that brought about the tensions that eventually culminated into the Civil War.
We need it!
Wilmot Proposal: Proposed in 1846 by David Wilmot, it was a proposal to prohibit slavery in the territory acquired by the U.S. at the conclusion of the Mexican War. The conflict over this was one of the major events leading to the Civil War. The intensity of the debate prompted the first serious discussions of succession.
As part of the compromise of 1850, the Fugitive Slave Act was amended and the slave trade in Washington D.C. was abolished. Introduced by senator Henry Clay. This led to the Civil War because it prevented further territorial expansion of slavery while strengthening the Fugitive Slave Act, a law which compelled Northerners to seize and return escaped slaves to the South.
Bleeding Kansas: Popular Sovereignty would determine slavery. Rival governments were set up in Lecompton (Pro-slavery) and Topeka (Anti-slavery). This led to violence in Kansas between the two groups, eventually causing an entire city to be burned down. "Bleeding Kansas" can mainly be said to have led to the establishment of the Republican party, which made compromise between the North and South less likely, contributing to the Civil War.