Let's recap...
Harbal: If you two guys could only agree on where objective morality comes from, you would make a very formidable team
Me: We do. We only differ on details.
Me: Mannie is Christian, I'm a deist. That sums up the differences.
Harbal: The God of the Bible is basic and essential to IC's view of morality, so if you don't believe in that particular God, you're not on the same page at all.
Me: I reckon God is God no matter what particular take any of us have on Him. Mannie's got his take, I got mine: God stays the same no matter what we think or how we differ.
I'm not gonna go beyond that.
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Now, how about you, IWP?
If you're a moral subjectivist: Why is slavery wrong?
Don't tell me you think it's wrong. Tell me why you think it's wrong. Give me your reasoning, please.