What about morality for the survival of society and the common good?
I do not know what you mean. To me, that is all morality is.
Again, this presupposes that humans have an intrinsic value attached to them. What does it matter , objectively speaking, that we survive or not, or that the greater good should matter more than the individual egoistic and sometimes psychopathic good?
It doesn't matter.
And if it doesn't matter, there is no presupposition that humans have any intrinsic value (beyond what a person/family/society/population puts on them). We can theorize (evolutionary theory) that groups of social animals with a morality that works towards the common good rather than the "individual egoistic and sometimes psychopathic good" had a survival advantage over those groups that didn't.
Where do you ground that intrinsic human value in reality? Because this is what this argument is about. Not how we acquire knowledge of the good or bad but where it is rooted in reality; why it exists.
I see it as rooted in reality, based a varying mix of reason, compassion, empathy, and relative human wellness, the Silver Rule, and the social contract. It exists because that behaviour evolved with as as social animals.
What gives a human value without God? That is the problem.
I do not see a problem. Your question makes as much sense to me as "What gives a human value without Gribbg?".
So it seems to me that, in order to be coherent, you should either believe right and wrong exist and that humans have a value and that God must exist along with them; or that right and wrong don't exist and humans don't have value and God doesn't exist either.
Why can you not make a determination of right and wrong based on reason, compassion, empathy, and relative human wellness, the Silver Rule, and the social contract?
The second option really seems to suck to me. Does that make it not true, no, I didn't say that.
So it sucks. But, it still beats the alternative by a long shot (not existing at all).
But it certainly contradicts my experience of life and reality.
Indeed. And the Earth seem flat, and to hang in space while the Cosmos rotates around it. The desk on which my computer monitors rest seems to be of a solid material, and not mostly empty space.
Why should I believe that then?
I don't know. For me, it would seem a more coherent description of reality, and I want to believe as many true things as possible, and as few false things as possible.
What motivates you to be here in this forum?