elfishness is an evolutionary trait that is necessary to ensure survival and procreation. "Good" and "bad" are nothing more than a set of artificial rules needed to ensure a functional society.
Agree with the first part, not with the second part. People are inherently selfish. But there is "short term" selfish, and "long term selfish" just as their is "selfish selfish" and "overlapping or mutually beneficial selfish."
Bee's don't give a rats arse about flowers. They just steel the nectar.
Flowers don't give a rats arse about bees, they just sit back and let the bees cross pollinate them.
This selfish act helps each other out, without them even needing to know about this.
Adam Smith wrote about this as "enlightened selfishness" in "The Wealth of Nations."
Baker doesn't care about you, he only wants your money. But he knows he won't get it unless he makes bread you'll willingly buy.
MORAL BEHAVIOR
I believe any definition of "moral behavior" is based on a relatively homogeneous society where everybody agrees what's "right" and "wrong" based on how these "mutually selfish transactions" are carried out.
Or you could define "moral behavior" as the collectively understood set of principles that let this "mutually selfish behavior" come to a maximum point. OR to generate a maximum "running average" of the most maximum benefit in the aggregate.
Once it's codified into law, it's recognized as "natural law" that lets men operate at their "best" possible capacity.
I also believe that there are very FEW OCCASIONS in history where this "natural law" prevailed. It's almost always hijacked by those that are best at projecting power.
And that for the most part of human history, the ONLY law (moral or not) is this:
MIGHT MAKES RIGHT.
It will always and eventually come to that point, upon which society will rise to a point of maximum centralization (the givers of the law) before collapsing in on itself.