Tell me what the Bible says is wrong with having slaves as I read it from the first page of the Old Testament to the last and the same with the New Testament. The old Testament refers to how one treats his slaves.
Different arrangements, some allowed for under various covenants, have all been called slaves, which has led to confusion.
The bible has NEVER supported anything like the former US practice of color based slave status, or a slave status which would inhere to progeny. That was an outright blasphemy, and to be fair to the current tense state of race relations in the USA, the underlying evil (a stealing of what belongs to God) was never truly confessed by the American people.
The closest thing to the biblical practice we would know would be the former practice of “indentured servitude.” The Old Testament presented an option of permanent servitude, but the slave had to choose it and it still did not inhere to his or her progeny.