I expect this response despite the indication of its issue. Were nazi’s morally rigtheous in gassing millions of innocent people to death because they believed so? At that time that was their ‘progress.’ Independent of other socities or yourself having any issue, it’s simply fine to say that because a nazi thinks it’s fine, it is fine?
I don’t think so, and I don’t think that injustice is dependant on my preference to view it that way. It just is wrong.
Would need to go the a priori, teleological, or modal route - definitely no empirics to claim. I absolutely think objective morality can coexist with invented morals. As stated prior, the majority of morals likely are subjective, but it doesn’t follow to me that all of them are. I don’t think the idea that ‘using zyklon b to kill millions of innocent people is bad’ is an invention. I’m fine with the idea that people realized not through invention but discovery that, ‘yeah it is pretty fucked actually.’