But slavery remained the foundation of the economy throughout the first half of the 19th century in many southern States, particularly South Carolina. The dispute over slavery increasingly divided the North, many of whom opposed it, from the South, many of whom relied on it. | But slavery remained the foundation of the economy throughout the first half of the 19th century in many southern States, particularly South Carolina. The dispute over slavery increasingly divided the North, many of whom opposed it, from the South, many of whom relied on it. |