Which was a reason that rice farmers promote the spread of slavery

Rice farmers needed a lot of workers to help them plant, sow, and reap. Slaves were more cheaper than servants, as they usually didn't have to pay any more than the amount is needed to keep the slave alive, while the servant can demand for better wages.

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Non-landowners, former slaves, native americans, and women to vote. in 1965, the voting rights act was passed to support minorities and remove the literacy