Discuss the events leading up to secession/the Civil War. What were some (at least three) key causes of the divisions in the United States that led to this crisis that occurred in the late 1840s/1850s

Discuss the events leading up to secession/the Civil War. What were some (at least three) key causes of the divisions in the United States that led to this crisis that occurred in the late 1840s/1850s? What role did the future of the the West play in this crisis? Remember to incorporate specific examples/details from the course materials to support your essay. keep it simple I have to write this in an hour on a proctored final and can bring in one sheet of paper. simple easy essay