Moral relativism vs objective right and wrong.
The science is clear, relativism is the superior morality.
Objective morality and normative ethics fail when compared to any variety of subjective morality abd relativistic ethics.
We must recognize that we should place moral value differently on people depending on their relation to ourselves, specifically their genetic relationship compared to ourselves.
We do not owe all people an equal degree of moral obligation, my child is not the same as the child of a stranger, and someone of my race is not the same as someone of another race.
My duty differs depending on the people involved, especially where it concerns their genetic identity and how it compares to mine in terms of similarity.
The principles of evolution are the source of the psychological traits that gave rise to morality and ethics, this they should be used as the basis for our moral and ethical philosophies and beleifs.
The normative ethics and objective hectic moral principles can come second, we could use utilitarianism to quantify what our goals for others should be (what should be maximized in a ratio of "good" to "evil"), and the non aggression principle as the rules we should minimize violations of in pursuit of those goals ("minimize" not "avoid", ot should be placed at the bottom of the moral ratio).
But this equation should also assign a different value based on things like genetic similarity, potential time range of fertility, etc. That factor into how well they can contribute towards producing living organisms with copies of our own genes in the future; The more genes that show up in future organisms, the better, and the further into the future that these organisms live into, the better.
The science is clear, relativism is the superior morality.
You can even make that statement with confidence if you're a relativist.
I can, and I have the computer models to prove it. I can, and I have the historical precedent to prove it. I can, but I suspect that what you imply by "relativistic morality" is different from what I do when I say it here.
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