Slavery was mainly concentrated in the South by 1830. Slaves were used on small farms and large plantations. They were also used in towns as domestic workers and labor for various industries. Slaves were considered to be property because they were black. They were kept as slaves by the constant threat of violence. They were not allowed to forget they were slaves even though they lived with their masters. Many slaveowners genuinely cared about their slaves, but never saw them as their equal. But the largest percentage of Southerners did not own slaves. Most Southerners worked their own farms yet, curiously, they defended slavery as an institution. Many resented the wealth and power of the large plantation owners but at the same time held out the hope that someday they could join those ranks. Also, while poor Southerners were looked down on by rich plantation owners, they could themselves look down on blacks as an inferior group.