God has allowed people and cultures a lot of freedom. Having freedom has revealed the true state and condition of people’s hearts and minds. Many of the OT accounts are historical narratives which do not hide the wickedness of humanity and the harmful ways people treat one another. Human cultures have been filled with abuse, even Israel which had God’s laws. Do you think further rules about rape or not treating people like property would really change the minds of so many who only care about themselves? In the NT, we are told to love our neighbor as ourselves. How many people listen or follow through with that?
Ultimately, God is more concerned with a person’s enslavement to sin and their eternal destiny, rather than perfecting this fallen world.
“The reason the Bible talks about slavery is that slavery was a very common phenomenon in both Old Testament and New Testament times. It is only natural that the topic would come up, both from a legal stand point and simply as a common part of the history recorded in both Testaments.”
“It would appear from the Old Testament that God did not specifically condemn slavery. That may seem odd to us, as slavery is such a clear violation of basic human justice. It is not as if the Bible ever encourages slavery. You will not find a single passage of scripture which in any way whatsoever encourages any follower of God to own slaves. However, in the Old Covenant, God did allow for slavery. God allowed a number of practices under the Old Covenant which he nevertheless did not want his people to do.”
“What about the New Testament? Slavery is neither specifically allowed not specifically condemned in the New Testament. At first, knowing Jesus’ teaching, this may seem a bit surprising. Clearly Jesus would never own slaves! Nevertheless, slavery was a massive institution under Greek/Roman civilization. As many as half of all people were slaves. If Jesus had declared all slaves free under the New Covenant, it would have brought massive and unnecessary persecution down on the early church. Perhaps this
is why God chose not to specifically condemn slavery. Paul encouraged
Philemon to free his slave Onesimus. Yet, in general, he encouraged new
disciples to be willing to stay in the situation they were in when
converted. As far as God is concerned, whether one is a slave or free here on earth is not the main issue. The chief concern is whether one is a slave to sin. God, through Paul, encouraged Christian slaves to be the best possible slaves, yet to seek freedom if they could. He did not incite slaves to revolt from their masters. I am sure that a slave who was owned by a disciple would have lived under exceedingly good and fair conditions, if he or she was not freed outright.
It is worth bearing in mind that in the end, it was Christianity and the
teachings of the Bible which led to the worldwide ban on slavery. Although it is true that due to the extreme level of slavery in the time of the New Testament, God chose not to ban the practice outright, history tells us that it was the teachings of Jesus Christ which caused the downfall of the cruelest institution mankind ever invented.”
Why does God allow slavery in the Old Testament? – Evidence for Christianity