This is no diversion, I'm simply attempting to understand where your ability to form a viewpoint concerning slavery is coming from. You seem to be not only opposed to slavery, but opposed to the teaching concerning slavery in the bible.
If you believe yourself to be just a randomly evolved life form of a mindless, meaningless, purposeless and goalless naturalistic mechanism 'creating' you, your opinion concerning slavery is also mindless, meaningless, purposeless and goalless. It's simply the product of the firing of evolved synapses in your brain. Your thoughts are really not your thoughts, but simply naturalistic mechanisms interacting with each other.