An absolute good?
I think you must be referring to an aspiration rather than an actual extant fixed standard or absolute benchmark. I'd suggest that such an aspiration is actually
a mirage which doesn't really exist and you may as well go looking for the crock of gold at the end of a rainbow.
This is it. That's the difference between our philosophies. Do ideals exist? Do ideas exist? Does anything immaterial exist?
I don't hope to get too off-topic (it may be too late), but have you read a lot of what Plato has written on this subject?
Otoh although I don't believe in any gods I will agree that a perfect divine entity/god could perhaps, possibly set or represent such standards. But even then that would amount to nothing if any human go-betweens were part of the process.
I am in agreement.
How might a perfect, divine entity account for this situation?
...Perhaps by assigning Himself the role of mediator.
Slavery only had to be deemed sufficiently wrong enough to get it stopped, I don't see any need to worry if there is an absolute objective standard involved.
"Wrong," here, means falling short of some ideal, does it not?
Try this: The end of slavery in the United States
was good because it made the country more ________.
I'd say any descriptor you can fit into that blank space is an absolute (not relative) moral ideal. And one that you (and I, and everyone)
actually use to evaluate how "good" or "bad" something is, morally.
I think people are unaware of how much they actually do appeal to moral absolutes.
As a presumably fallible human how would you even recognise an absolute moral standard anyway?
I might not. This problem necessitates certain philosophical solutions. Few theologies address this issue. Incidentally, it's one of the reasons I eventually came to reject Protestantism.
Do you want something to point to if someone else has a slightly different version from yours, perhaps if they were written in tablets of stone? Then we would perhaps all know if our moral values were slipping.
Again, forcing my moral beliefs on someone else does no good for anyone. I simply won't do it. People must make moral decisions freely (this, too, is affirmed by Catholic teaching).
But I do think people ought to consider which moral standards they appeal to - it's worth knowing what your "greatest good" is.