Did you not read my previous posts? Doesn't the Bible say (Rev 21:3,4) that everything will be changed permanently after the "apocalypse", as someone put it earlier?
Screw whether or not this is true, and just recognize that time is going by until this time comes. In the meantime, God is (as he was during the slave days) regulating societal norms -- that doesn't NOT mean he's limited to humans morals, as it were, or that he even started slavery (which was well underway before Israel became God's people)
It's not much different that as a business owner, you see you have crappy workers and are working toward hiring new workers. In the meantime, you are tolerating the crappy workers until it's time for you to fire them and hire the new guys. That doesn't mean you want the crappy workers, or are encouraging them to be crappy.
The Bible "2.0" came in the form of "love thy neighbor as yourself" which probably is the single most command that encompasses EVERY life situation... basically, not doing anything you don't want done to you. You can apply that virtually anywhere, any situation, and person despite race, religion, etc.
You can apply that to simple things too!