Stop whining and answer the question. In #59 you twice asked: “why is it moral in and of itself” referring to my argument for an equitable society and an equitable distribution of wealth. The thing is that I never said they were. It is you assuming “morality in and of itself” is the benchmark. Not I. So again why do you assume there is anything that is “moral in and of itself”?
It's a safe assumption,
if the philosophy you are putting forward is coherent. It might not be, though, but if so then asking you to explain what is "moral in and of itself" will highlight the incoherence.
Here's an exercise for you. Pick a thing you think is morally valuable, for example an equitable society. Then ask yourself "
Why is it morally valuable?".
One of two things will happen. Either you can support its moral value by referring to some deeper moral idea, e.g. "an equitable society is morally valuable because is maximises happiness", or you can't and the process stops. You just say "I think an equitable society is morally valuable just because it is, there is no deeper moral idea, it's just morally good in and of itself".
If you went deeper the first time, repeat the process. Why is it morally valuable to maximise happiness? Repeat the process again. If your moral theory is coherent eventually it will bottom out and you will find the thing(s) that you think are valuable in and of themselves. Not because some deeper value makes them morally good but just in and of themselves.
Of course this might not happen. One thing I've seen people do is end up going around in circles, for example arguing that survival of the species is good because the species has evolved to survive, and that doing what we evolved to do is good because it ensures our survival. That's a possible failure mode.
It is entirely relevant to morality. Morality is merely a code of behaviour deriving from the evolved instincts of self-preservation and procreation as social animals. They are genetically encoded into us and form the basis of our morality in every case.
I've already explained that this claim is trivial to the extent that it's true, and false to the extent that it explains nothing. Nothing changed in our genes between 1800 and 2014 that made us decide that women should have the vote and scientists should have to ask permission from an ethics committee before they cut up a mouse.
Morality is indeed "deriving from the evolved instincts of self-preservation and procreation as social animals" in a very weak sense, but so too is aeronautics or cat memes. It's true, it's just trivial and has no applicability.
No, it tells us what we should do, based upon knowledge of ourselves as a social species, to enhance social cohesion. Therefore it’s “prescriptive”. In short, it provides the framework for a moral code of behaviour. Or, to repeat, do you favour the notion of an absolute morality existing in some sort of eternal metaphysical realm?
You're getting hung up on a terminological problem. Any ethical claim is prescriptive in the sense you are using the term, even daft ones like "you should grind pepper with your left hand to please the Flying Spaghetti Monster".
That's a different sense of the term to the descriptive/prescriptive distinction being made here. In this sense a moral project is descriptive if it's investigating what people actually happen to think, and prescriptive if it's making a case about what people
morally ought to think. Science in this sense does strictly descriptive morality. By its very nature it has nothing to say about prescriptive morality.
I was dealing with your snide response to my: “survival of the species is the driving force of evolution". This is not in question.
It's funny how the people who make evolution their moral messiah so infrequently understand it. The unit of evolution is the selfish individual gene, not the species, and it competes for reproductive opportunities in an arena defined by both natural and sexual selection. The claim you say is not in question is actually plain empirically false.
The Selfish Gene was published in 1976 so at a rough estimate your scientific ideas are about forty years behind the times.
And the SOP for the non-science of normative ethics crowd is what - philosophy as expounded by your guru Pigliucci? I think not. Richard Carrier demolishes his arguments in his ‘The End of Christianity’.
I submit that based on the contents of this post, your judgment about what constitutes the demolition of an argument is probably not as acute as Pigliucci's.