How did Slavery in America affect society?

It made an agricultural industry in the south possible.

For those owning plantations, it made great wealth possible.

It set up a class system.

Even people with small farms seemed to have been able to afford 1 slave, so the south had economic reasons for engaging in the civil war. There were 69000 farms in the south when the war broke out. Each had at least 1 slave so they were very dependent on that labor.