morality is subjective and people don't have free will

[Angrboda]

It's the collective response which determines morality.

Sounds pragmatic but not principled. I guess if everyone comes to think female genital mutilation is okay then it will be. Today slavery is wrong but it was okay in the 17th century. And exactly how does one define the collective response? Is 51% sufficient to determine if something is moral?

Your principles hopefully lie in your gut rather than an ancient book. Where would you suggest we get our principles from?

Our morality appears to be a mix of subconscious drives with an icing of cultural framing on top. [...] But the subconscious part of morality seems rather inflexible, so I think we'd still have issues with killing.