This is a linkpost for https://atheistkit.wordpress.com/ethics/
That is why it is right to speak of morality in general, and human morality in particular.
I prefer Eliezer's way because it makes evident, when talking to someone who hasn't read the Sequence, that there are different set of self-consistent values, but it's an agreement that people should have before starting to debate and I personally would have no problem in talking about different moralities.
Eliezer believes that human values are intrinsically arbitrary
But does he? Because that would be demonstrably false. Maybe arbitrary in the sense of "occupying a tiny space in the whole set of all possible values", but since our morality is shaped by evolution, it will contain surely some historical accident but also a lot of useful heuristics.
No human can value drinking poison, for example.
What is "good for us" is not arbitrary, but an objective fact about relationships between human nature and the world
If you were to unpack "good", would you insert other meanings besides "what helps our survival"?
"There are different sets of self-consistent values." This is true, but I do not agree that all logically possible sets of self-consistent values represent moralities. For example, it would be logically possible for an animal to value nothing but killing itself; but this does not represent a morality, because such an animal cannot exist in reality in a stable manner. It cannot come into existence in a natural way (namely by evolution) at all, even if you might be able to produce one artificially. If you do produce one artificially, it will just k...