Answer:
The Civil War in the United States began in 1861 after decades of simmering tensions between northern and southern states over several issues, including slavery, states’ rights, and westward expansion. The two major causes of the Civil War were slavery and states’ rights. The economy of the South was based on the cash crop plantation system, which depended on the institution of slavery, whereas the economy of the North was based on manufacturing and industry and was not reliant on slaves.
Growing abolitionist sentiment in the North after the 1830s and northern opposition to slavery’s extension into new western territories led many southerners to fear that the existence of slavery in America—and thus the backbone of their economy—was in danger. The election of Abraham Lincoln in 1860 caused seven southern states to secede and form the Confederate States of America; four more states soon joined them.