Your mistake, you never should have tried to make your point using slavery. Your holy book and you God completely endorse slavery. Slave owners of the South believed, and had no problem saying so, that owning slaves was their "God Given Right." And as devout Christian, as most all slave owners were, they were absolutely right. God see's nothing wrong with one human owning another, so why should I have a problem. Slavery was not universal.<quoted text>
So if man defines morality, then slavery, which society deemed morally acceptable was ok?
I hope you see the absurdity of the position you hold when you try to give society the credit for setting morality...
You cannot argue that anything is intrinsically wrong or right, it is just a matter of crowd politics.
That then means that morality is merely the expression of the majorities desire.
Which creates a problem, when the majorities desire is harmful to the individual...
Most societies can agree on what is harmful for its citizens and the moral laws reflect that. Left to their own devises without the interference from religion, a society will define what is harmful tom it;s citizens and pass laws. Look to Islam to see how religion poisons this process. Islamic rule see's nothing at all wrong with senseless murder, and torture. All under then guise of their God ALLAH.
Christians had their day in the sun during the inquisition, another fine example of a moral code set by religion. The Inca's cut out the hearts from thousands of the living to appease their Sun God.
For your information, the GOLDEN RULES works perfectly fine for a society that is looking for a solid moral code. NO demon God needed or wanted.