AskTheFamily, you have some very interesting - if somewhat misguided - notions about naturalism and its deductions. (And I feel I might be at least partially to blame for that, seeing how we've talked about the illusory nature of the permanent self before. Accordingly, I feel the need to put some of these misconceptions right and jump straight to the relevant passages
I think naturalism can account of how a delusional concept of self was created through evolution.
You seem to be excessively fond of the word "delusional" when it comes to naturalism. But even the most "materially reductive" naturalism does not conceive of the "self" or "morality" as a delusion - nor is it the logical consequence of that specific angle.
Now, I'm not a reductive materialist, but a monist. Still, I hold that the notion of a perpetual, unchangeable "self" is an illusion, drawing upon empiric observations shared by the mind sciences, psychoanalysis et.al.
But I fear that you have misinterpreted what this means, and why there is a difference between this illusion and the "meaningless delusion" you believe to detect there.
Let me try to explain:
If you believed there was a green-fanged monster standing right behind you that'd eat you the moment you turned around and acknowledged its existence - THAT would be a delusion. Nobody else would see it, and even if you hallucinated to the point where you'd actually feel that it attacked you, it'd still be a mere product of mental disease.
What I am talking about when I call the permanent "self" an illusion or a construct is something else.
Imagine that you are looking at a large building that's been constructed to look as if it consists of a single slab of polished stone, especially from a distance. It is easy to believe that this building is seamless and whole in and of itself - but it is not. Upon closer examination, you would detect that it consists of many different parts - parts that are occasionally replaced with others, parts that do not fit together perfectly, parts that create the impression of a seamless coherence, but are in fact only constructed to look that way. What's more, the unseen interior of the building (where most things are happening) is even more malleable and shifting, with office spaces being rented out to different companies, rooms being re-arranged and adjusted to personal taste, etc.
THAT is what the "self" is like: not a delusion, but a construct that creates the illusion of permanence and singularity, even though it consists of many shifting parts.
It's very simple why. Those who had a concept of self and identity, would survive.
As full-fledged self-awareness is still a pretty rare (and recent) phenomenon, I doubt that this angle holds water. Especially seeing how some of the most successful species on the planet who've been around a hundred times longer than Man can obviously do without it altogether: ants, jellyfish - even germs.
Self-awareness might give *some* advantage to *some* species, but it might also be a mere by-product of other cognitive functions that have aided our ancestors adapt better to their circumstances.
This post would become FAR too long if I addressed all of your points in a single reply, but I'll get back to that.