Final answer:
The primary driver of the southern economy through 1860 was cotton, which relied on slavery for its production. Slavery provided the essential, abundant, and cost-effective labor necessary for cotton cultivation.
Step-by-step explanation:
Until 1860, the dominant force propelling the southern economy was cotton.
The Southern states, particularly those along the Mississippi River Valley, emerged as the primary producers of cotton, with slavery forming the linchpin of this economic system.
Slavery provided the essential, abundant, and cost-effective labor necessary for cotton cultivation.
The profitability of cotton, intertwined with the institution of slavery, not only sustained the Southern economy but also contributed to the profits of Northern cotton mills.
The Southern economic and cultural identity became deeply rooted in slavery and cotton production, rendering any shifts or anti-slavery sentiments perceived as threats.
Cotton held pivotal importance in the international market, while the South relied on other regions for provisions, manufactured goods, and financial assistance.
In essence, the nexus of slavery and cotton cultivation constituted the cornerstone of the Southern economy until 1860.