So what about Greek Slavery or Roman slavery, can't blame the Bible on that....or many other places. And for slavery and segregation you vote for a party that did that and continues to push segregation to this day. In fact if you oppose segregation, they call you a white supremacist....so no progress really hasnt been made...people are people and they will always push their own interests...........
Slavery still exists today........its simply re-defined as the penal system. No one that has been imprisoned have been imprisoned because of free will. Call it what you will but once incarnation takes place.......those held prisoner are called and treated as "property of the state".
As far as God condoning slavery as a type of trade and commerce.........nothing could be further from the truth found in scripture. Slavery as regulated under the Old Testament Law is much like our modern Penal System. Even under the Old Testament law it was taught that one should LOVE THEY NEIGHBORS as themselves. (Lev. 19:18)
Because slavery existed does not mean that God taught it as being correct or righteous. The scriptures are a history that includes things other than what God condones. For instance when confronted with a question from the Jewish leadership of His time........a question where they attempted to trap the Christ in some type of contradiction, they asked Jesus about marriage and divorce whether or not it is lawful. Jesus answered then, "Moses because of the HARDNESS OF YOUR HEART, MOSES PERMITTED YOU TO DIVORCE YOUR WIFE...........BUT FROM THE BEGINNING IT WAS NOT SO." -- Matthew 19
The same applies to slavery as it existed during the times of Biblical Israel. God did not necessary condone it....but because of necessity He tolerated it and regulated it with HUMANITY, eventually there was a progression away from the practice as defined in clarity in the New Testament of Christ Jesus.
Many fail to consider the reality that confronted Biblical Israel, being nomadic in nature, roaming with no permanent structures or dwellings....i.e., NO PRISONS. When someone was convicted of a crime.....what was to be done with that individual if it was not a crime worthy of death? Thus under certain conditions.......just as in today's society.......slavery is not necessarily immoral.
Many of the regulation/laws in the Old Testament dealt with the treatment of criminals or those who committed crimes of war...etc., These individuals often were allowed to live instead of simply executing them.....much like those criminals who receive a life sentence in today's penal system.
Read from these regulations/laws concerning the treatment of slaves. (Lev. 18:21,24). Some of these people were sacrificing children by burning them. Would it be morally wrong for God to allow these individuals be punished by enslavement? What was done with a thief? (Ex. 21:1-3)......the scriptures declare that the thief should replace in value the things that were stolen......if he could not, the victim was allowed to sell him into slavery for a specific amount of time until the debt was paid in full.
In reality.......Biblical Israel's treatment of slaves was way ahead of its time as far as being HUMANE to those who were slaves because there was no penal system in place. Read Ex. 21:20-27. No one was allowed to strike a slave/servant with a rod to the point of death.....or the slave owner would be subject to the proper punishment of a fitting crime. It goes on about fitting punishment for striking someone with child in her womb...etc., These regulations compare to today's penal codes in relation to criminal activity.
Further: when combatants were captured they were enslaved and often if the slave was well behaved he was allowed to assimilate into the tribe...etc., What's better? Simply kill the captured where they stand or allow them a chance to live and assimilate? Some crimes against humanity were so great...that the death penalty was the only option. As was the circumstance when dealing with those who worshiped the evil god Baal.............Who captured children and used them as sex slaves and often sacrificed children and those captured at the alter.....it was an evil that God decided needed to be wiped from the face of the earth, so as not to infect the righteous with such evil.