Yet it clearly does, and given you already recognized the premise of “I think, therefor I am,” you clearly recognize there is a unity here. You seem to want to have unity when it matters to recognize self and attempt to derive value, and then reject it now. You can’t have it both ways. Either there is an entity, a self, or there is not.

Actually, both can be true simultaneously, in the sense of both self and subself existing and being relevant at once.

Like, causal bundling again - people talk about nations being “just lines on a map”, but they’re actually a very complex wave-like phenomena involving institutions, land, resources, people, culture, and so on that form a clear causal bundle and natural category.

So one can, actually, coherently both talk about a nation doing something and the factions and individuals within a nation doing something.

The self can exist in a way that derives value without totally ignoring that it is composed of subcomponents that aren’t wholly unified.  Much like the self can exist despite the influence of drugs on the mind, but without ignoring the influence of those drugs.

The primary reason to say that we cannot recognize the influence of the subcomponents on a moral level is a desire for applying infinite moral liability.  Thus, effectively, pretending that there is no tension between the internal components and therefore, for example, when a person says they “want” to be of a healthy weight, but then eat too much junk food anyway and find it distressing, that this is their “true, revealed preference” that applies to their whole self, even if they hate it.

There is, of course, the practical matter of lack of access to sub-delineations - or at least, there is now at the current technology level.  But that’s a practical matter, and often modern courts of law will change sentences according to psychological state.

As for the ability of nations to think, that depends on how one defines the term.  I don’t think they feel.  Not yet.  The concept of what is to states as Transhumanism is to humans is not yet more than a grain of sand.