ETA: Here's a hint of what you should be looking for. "Provisional morality"? What does Shermer mean by that? Is it that there are fundamentals but no absolutes? Why does sherm talk about culture if culture is not relevant? Why does Shermer discuss the exigencies of our daily lives."
Those are all meaningless of morality is ONLY a product of genetics.
Nonsense. No one said it is only a product of genetics. I only argued against your claim that it had no basis in genetics.
Read it again, you will find that is neither a complete moral relativist and neither is he an absolutist.
Shermer discards moral relativism, which means he discards a lot of the allowances made for culture. In his way of thinking, it is just as wrong top kill another person, no matter which culture you belong to. He cites several principles that he bases his ideas on:
1- The Ask God Principle
2- The Ask First Principle
3- The Happiness Principle
4-The Liberty Principle
5- The Moderation Principle
Shermer doesn't ever say that slavery is right. Based on his principles, it is always wrong. Many relativists would say that this is a judgement we are not allowed to make as it may interfere with someone else's cultural beliefs. That is a position that is unjustifiable and cowardly.
And he discards the idea that it is okay for one culture to visit atrocities on another, regardless of the beleifs of the culture they belong to. The closest he comes to allowing this would be if you could show that the other culture was, in fact, a different species which is going to be pretty hard considering our knowledge of genetics.
Shermer also discards absolutism for obvious reasons. Sometimes there are good reasons for immoral acts.
Provisional morality is the result of applying scientific thinking to morality. Something many people say is not possible but seems to work very well.
As he puts it: "In provisional ethics, moral or immoral means confirmed to such an extent it would be reasonable to offer provisional assent."
He then goes on to apply the idea of fuzzy logic to the problem to come up with Fuzzy Provisional Morality.
I think you would agree that his ideas make a lot of sense. It is a position I have held for a long time, one I originally got from Sagan's and Druyan's writings. In fact, it is a postion I have expressed in almost every discussion of morality I have ever gotten into. It is also a position that many people say is impossible to hold. They say science has nothing to say about morality. There have been a whole lot of scientists who seem to disagree.