The antebellum South was transformed by cotton's rise to economic dominance. This period saw the expansion of slavery, the growth of the plantation system, and the emergence of a powerful planter class that shaped Southern society and politics. The cotton economy's impact extended beyond agriculture, influencing technology, infrastructure, and cultural life. It also deepened sectional divisions between North and South, setting the stage for the Civil War and leaving a complex legacy that continues to shape American society today.