We evolved intelligence, and it is through intelligence that we build houses, make tools and other technology, create art – and fly.
A basic principle of morality that we have “evolved” is the principle of non-exploitation of others. Flying passes that test with…well, flying colors. It is a neutral application of our intelligence, as it is not directly victimizing another human being. In and of itself, it is not tantamount to intending harm to one’s neighbor.
Stealing is directly victimizing another human being (as, in most but not all cases, lying).
“Don’t kill; don’t steal; don’t rape; don’t torture or abuse” – those are the basics, which have evolved in a social context. They are the ground-rules for living in a community. Those who commit these acts are “anathema” in a community; they are imprisoned (and, in the past, were often hung or otherwise executed). No society has ever tolerated thieves.
So part of living in a society is that the “selfish” interest of the individual is compromised for the sake of the interest of the greater good, and we are socialized to feel “guilt” (not mere fear of punishment) at stealing (which is not to say that there many who feel no guilt at all, only the fear of punishment). But there is a trade-off to giving up one’s “selfish” interest in stealing – if I am expected not to steal someone’s stuff, they are expected not to steal mine.
That’s not to say that other forms of stealing are not more subtle – white collar crime, for example. A lot of white collar criminals have played that game of being ahead of the law, and have lost. Not quite in their self-interest, I would say. Others have stayed ahead of the law, but have sacrificed peace of mind (always fearing discovery). On the other hand, others have made it a rule of stealing and manipulating, and otherwise exploiting, in their interpersonal relationships (using people, treating them badly). I’ve observed that these people either end up lonely and without friends–sooner or later–or perpetually required to watch their backs, because they can’t trust anyone at all, as they tend to assume that the rest of the world is as predatory as they themselves are.
There is a reason the
philosophes used the expression “enlightened self-interest.”