Why did the north and south disagree on slavery during the great contribution?

The North and South disagreed on slavery primarily due to economic and social differences. The Northern states, which were more industrialized, favored free labor and saw slavery as an outdated institution that hindered progress. In contrast, the Southern economy was heavily reliant on agriculture, particularly cotton, which depended on enslaved labor. This fundamental economic divergence fueled tensions over states' rights and the expansion of slavery into new territories, ultimately contributing to the Civil War.