> That attitude would harm the public space, where standards to discuss current and new issues would be really helpful.
Actually there's more evidence that the public space could not exist without some sort of floor:
https://www.cambridge.org/core/elements/abs/evolution-morali...
https://www.sciencedirect.com/science/article/abs/pii/S01918...
MFT is highly debatable in terms of if it's the right definition of the floor, but it logically tracks that for society to evolve to the point where you can have useful discourse at all, individuals must be arrive at some floor for themselves.
> You also think the choice of slavery is proof of people falling below your personal moral floor. To me, and I think to the OP, it's proof that even questions with obvious moral answers are beyond empiricism. Which is the point you're missing.
You're confusing slaves and slavery: Slavery is complex enough that I will engage someone who wants to moralize it (after all, is it modern or historical? specific race? is debt-based slavery included? what about war? etc.).
But a slave is "a human owns another". I arrogantly consider it not worth my time to convince someone whether "a human owning another" is good or bad.
> So we need to know on what basis we arrive at the obvious answer slavery is bad, because the we can use that basis for more complex matters.
Nothing I said precludes logic to examining slavery: "Slavery increase the number of humans owned by other humans, so slavery is bad"
From there one might logically say: "Well what about economic cases, where technically I don't own you?", and then the logical next step might be to consider "at what level of penalties for a debtor does it start to become owned by the creditor?"
I'm a curious enough person that I'd accept discomfort to ensure my floor is low enough to allow deeply messy moral debate... but on the same coin, that reinforces my confidence that the precious few conversations that do get swept under it were probably not valuable. As always ymmv...
> Shutting each other down just for talking is authoritarian, and the thing about that is if the guy on top is your guy that's great, but you have no control over who the guy on top is.
Deciding not to convince someone of my point of view isn't shutting them down. This feels like a very messy attempt to force some sort of pro-authoritarian projection onto me :/