Answer:
Slavery was so profitable, it sprouted more millionaires per capita in the Mississippi River valley than anywhere in the nation. With cash crops of tobacco, cotton and sugar cane, America's southern states became the economic engine of the burgeoning nation.
Slavery was an integral part of southern life. Many southern politicians, journalists, and economists began to argue that the northern free labor system harmed society more than slavery did. Southerners claimed that enslaved people were healthier and happier than northern wage workers.