huh?
Oh, I get it.
You are merely going to dismiss it as my not liking your "answers" instead of even trying to understand that you have not actually answered.
it seems you think that Gods laws are there to control us, when in fact that they are there to protect us.
God values human life more then we do. He has a law against murder because he values human life.
He has a law against violence, because he values human life.
He has a law against rape, because he values human life.
He has a law against disobedience, because he values human life. etc etc etc
He does not outlaw us creating our own cultures though. And because the human race chose to be independent (due to Adams disobedience) he does not control how we choose to run things. Slavery was a human invention and it served a purpose...just as the monetry system was our invention to serve a purpose. God allows us to create our own environment and way of life.
He has been trying to tell us that we were not created to be self governed, but we refuse to listen. So by allowing us to be self governed, he is allowing us to learn by experience.
Jeremiah 10:23
I well know, O Jehovah, that to earthling man his way does not belong. It does not belong to man who is walking even to direct his step....25 Pour out your rage upon the nations who have ignored you
Eccl 8:9
All this I have seen, and there was an applying of my heart to every work that has been done under the sun, [during] the time that man has dominated man to his injury
Slavery was created by man, not God, and it still exists in various forms and people take advantage of it. For as long as we are independent of God, we are our own masters and we create this world the way we want to create it. If you dont like what you see in the world, then you would do well heed Gods advice:
Proverbs 3:3 
My son, my law do not forget, and my commandments may your heart observe, 2 because length of days and years of life and peace will be added to you
5 Trust in Jehovah with all your heart and do not lean upon your own understanding. 6 In all your ways take notice of him, and he himself will make your paths straight