Answer:
Violence over the Kansas-Nebraska Act.
The publishing of Uncle Tom's Cabin.
Passage of the Fugitive Slave Act.
The Supreme Court's decision in the Dred Scott case.
Step-by-step explanation:
The Civil War was a major war fought within the United States between the Northern Union states and Southern Confederate states. This war that resulted mainly from the disagreement about the issue of slavery, ended in the victory of the Southern states and the surrender of General Robert E. Lee and his Union troops.
The start of the Civil War can be attributed to many factors, some of which are that of the Fugitive Slave Act, the publication of "Uncle Tom's Cabin", the Kansas-Nebraska Act of 1854, and the Dred Scott case of 1857.
The Fugitive Slave Act of 1850 gave legal permission to return runaway slaves to their owners even if they are found in free states. Added to that, the publication of Harriet Beecher Stowe's "Uncle Tom's Cabin" in 1852 further fueled the case of the slaves and their want for freedom. Then came the Kansas-Nebraska Act that allowed the residents of the two states to decide for themselves if they want to allow or practice slavery within their boundaries. And lastly, the Supreme Court's decision in the 1857 Dred Scott case where a free slave Dred Scott was denied his freedom, thereby suggestive of the fact that slaves will never be given legal citizenship aside from being slaves. All these factors contributed to the American Civil War.