I don't know all the causes but it started mostly when the south succeeded and kept slaves apposing to the north where they didn't want to keep slaves.
Answer:
Industry vs. Farming.
States' Rights. The idea of states' rights was not new to the Civil War.
Expansion. As the United States continued to expand westward, each new state added to the country shifted the power between the North and the South.
Slavery.
Bleeding Kansas.
Abraham Lincoln.
Secession.
Activities.
Explanation: hope it helps
