DaveC426913 said:
And altruism is simply putting OTHERs' interests above your own.
And "others" would be a group - a larger scale of the system. Of which the self feels a part.
It is fascinating how these kinds of arguments go on forever as there is always truth on both sides of a dichotomy. And yet the desperation to reduce causality to a monadic, non-systems, model means the greater picture is missed.
I would prefer to use the more general terms, competition~co-operation, differentiation~integration, or construction~constraint to capture the local~global dynamic at play here.
If people must use the terms selfish~altruistic, then that makes the threads harder to disentangle.
But anyway, a system is an equilbrium structure that persists because it dissipates its foundational tensions across all scales. By foundational, I mean the contrasting forces of local construction and global constraint. You have two actions, top-down and bottom-up, and if they work together in synergistic fashion, you can have a structure that is always rebuilding itself and so will persist in time.
So the basic moral puzzle is it natural only to be selfish? Are examples of altruism actually disguised self-interest? Or is disinterested action, even self-sacrificing action, also natural, and therefore not in any way surprising?
The arguments are then based on the idea that one or other must be the case. And examples of non-equilibrium situations seem to prove it.
So a suicide bomber might be taken as a case where a person foolishly puts the needs of the group above their own. Or a person who gives freely to charity might be said to be actually selfish because they clearly just want to buy our esteem.
As social creatures, evolved to weigh up very complex competition~co-operation cost~benefit analyses, we are very sensitive to perceived imbalances between the needs of the individual and the needs of the group.
But this comes back to the point that what we seek as natural is a balance of self and group across all scales. Which means our motivations when acting are never purely one or the other - selfish or altruistic. They are a synergistic blend. That is what makes the behaviour of the system as a whole adaptive.
And again, altruistic is just a bad word because it has certain false connotations. It atempts to site the decision in the head of the acting individual rather than make it a systems property. A suicide bomber doesn't just act out of some personal choice. Their thinking has been shaped as a group dynamic. Research has shown how bombers always come from groups who all came from the same village, hung around the same coffee shops, or in some other way were part of a very particular grooming process.
The balancing act between competion and co-operation must find its equilibrium over all scales. So it has to work for the "selfish" individual. And it also has to work for the family, the village, the nation, the world.
Nations act selfishly. They also co-operate. They fight wars and they also give disaster aid. After wars, they try to rebuild trading relations. After giving aid, they expect something in return - goodwill, influence, esteem.
This seems like having mixed motives and reductionists like monadic purity. But systems are the product of opposed causalities that then have synergistic results. That is why the exist at all.