1) Slavery was not part of the original plan..
Citation needed. You are going to have to show this claim is accurate.
It came after Adam chose to go his own way. So while there is slavery in the Bible, I wouldn't say it supports it.
2) In light of the first answer, No..
How can you possibly say the bible doesn't support slavery? Where is the Commandment "Do Not Own People"? If such a commandment were to be found in the bible, then I would agree with you.
But the fact the bible has multiple, new and old verses explaining how to own people? Pretty much says it supports ownership of people, so long as you don't kill them quickly, or if they are Hebrew men, let them go after a bit (but not their children...).
While we are way off the OP topic, do you believe the moon landings were real or fake?
Do I
believe the moon landings? Absolutely not! Belief is something people do when they wish a thing were real, but deep down, they know it isn't.
Proof? How many Christians prefer going to the Doctors or Hospital, instead if Church, when severely injured or very ill?
The bible is quite clear in it's instruction: Church, and be prayed over. Hospitals are "Man's Understanding"
and never to be trusted.
As for the Lunar Landings? I think it is very, very likely that a number of men were sent by rocket up to the moon, where 2 at a time, they landed and then returned. We have mountains of photographic evidence, including a lovely feather and hammer vacuum experiment proving gravity works on mass equally.
It's like this: Back in the Day, The US Government decided to Hoax The People with a Fake Going To The Moon.
The trouble is? They asked Stanley Kubrick to film the whole thing-- he proposed a budget, which was accepted. And so, the Fake Landings were actually filmed on the Moon, because, well, it's Kubrick, who is OCD about authenticity...
The evidence points to men going to the moon, and returning. Good Enough for Me.
But do I believe it? I try to avoid belief where ever I am able-- I prefer to stick to reason instead.
Track record for Reason? This very Internet, including micro computers necessary to make it work.
What's the Track Record for Believing? The Crusades? Salem's Witch Trials? Being against Gay Marriages? 9/11?
Naaah... I'll stick to Reason, thanks.