John_Mann it's almost as if you commented without having first read the OP. You wouldn't do that would you?
If I'm wrong about that then it's puzzling why you are attacking a position that is the exact opposite of the one I presented.
The point of my OP is to present evidence that "absolute morality" is a myth invented by theists in pursuit of moral certainty.
Rejecting absolute morality does not reduce our moral decisions to subjective personal preferences. Secular morals are based on objective facts about the well-being of conscious creatures.
You have already been corrected about your misguided opinions regarding ethology. You really need to get up to speed about that.
Around half of our genes are expressed in our brains. We have evolved complex means of living in social groups including a faculty for disgust, jealousy, reciprocity, anger, revenge and guilt. Survival is not just about being big and mean. In our species being "fit" involves an advanced ability to cooperate. This requires a brain that feels empathy, that can see the world through the eyes of another. We know from brain scans and from individuals who have suffered injury exactly what parts of the brain are involved in these functions.
You have yet to address the OP. Your work is all ahead of you.