To begin with, the Civil War was inevitable because the land couldn’t be divided up without some sort of problem. The first attempt at dividing the land was shown in the Missouri Compromise which made a dividing line to determine future slave and free states. After the Mexican War, The United States acquired new land. Then the Wilmot Proviso was created and it forbid slavery from any territory acquired from Mexico. Eventually, the Kansas–Nebraska Act of 1854 was made and it repealed the Missouri Compromise of 1820. It let popular sovereignty to decide if slaves should be allowed or not in the territories of Kansas and Nebraska. This led to the event of Bleeding Kansas and both sides having more disagreements and issues.
To add on, there were some laws that made the North and the South angry at each other. One of the more famous laws was included in the Compromise of 1850. That law was the Fugitive Slave Act and it stated that the northerners have to capture and return any slave that escapes to the North. One slave by the name of Dred Scott was famous for going to the North, only to be sent back to the south thus suing for his freedom. The Chief Justice at the time, Roger Taney, said that Scott couldn’t sue because Scott