How did "Bleeding Kansas" lead to the Civil War?

If you lived in Kansas, the Civil War began for you in 1855. This is when pro-slavery "border ruffians" poured into Kansas to attempt to establish that territory as a slave state. There they clashed with anti-slavery Kansans, as well as many people, like abolitionist John Brown, for example, that went there expressly to fight against slavery. The issue began when Senator Stephen Douglas extended the principle of popular sovereignty to the territory, which he organized under the Kansas-Nebraska Act. The fighting that led the territory to be known as "Bleeding Kansas" accompanied political intrigue and fraud over the establishment of a constitution for the territory. "Bleeding Kansas" can mainly be said to have led to the Civil War because it led to the establishment of the Republican Party. This development, which accompanied the collapse of the old two-party system that included the Whigs and the Democrats, made compromise between the North and South less likely. When the Republicans, whose platform called for a ban on the expansion of slavery, won the White House under Abraham Lincoln in 1860, South Carolina led the way in seceding from the Union. "Bleeding Kansas" played a major role in escalating tensions between the North and the slave states.