I think the us-them thing expands and contracts, fluctuating with social-circles and the individual’s perceptions of his/her inclusion in them. A symptom of this perception is the frequency and degree of altruistic acts of the individual toward members of this group.
It was argued before on another thread that all actions are essentially selfish, either directly sating a need within the individual, or indirectly saving up favours for later. I didn’t really want to totally accept that POV, but can’t really prove it’s otherwise, at least to a degree that I’m happy with.
So - Altruism starts, like charity, at home. And home is where the heart is, ie: our chest, ourselves. We begin in a group of one. Us + everybody else.
Then we recognize family, our genetic peers. Me&My close Family + everybody else. The bonds of reciprocal love are such that those family members become such a part of your identity, such a part of the foundation upon which you have built your persona, that essentialy, you regard them as extentions of self. And in helping them, process it intuitively as the self helping the self.
Then we make friends. Good friends, close friends, outgrowing simple genetic bonds not of our choosing, and extending the self further, encapsulating strangers, and subsuming portions of their thinking and experience within our essential selves. “He’s my right-arm man” they say, again perhaps intuitively grasping that this is not a metaphor, but simple truth. And in helping/supporting them - again the physical self helps the diffuse self.
Then we love, taking one woman or one man, and foresaking all others. (Well - if we are good little boys and girls anyway ) That person, in ideal circumstances, becomes a mirror, in which the self sees a perfected image of itself, and love splits in two, one part loving the provider of the image, and one part loving the image itself. Now the physical self not only helps the perfected self, but is willing to sacrifice itself… for itself.
[size=75][Forgive my bizzare phrasing][/size]
So, now the us group includes me, family, friends, loved one, loved one’s family.
Along comes baby. The spawn of two perfected reflected selves. Doubley loved, once for the present, and once for the potential future the baby holds, immortality, continuance of self beyond death. Now physical now-self helps next-self and future selves.
Now, baby needs a nice world to grow up in, one without too many sharp edges. Or equally pointy people. Now baby-making-Self realizes it can’t prevent baby-self from straying outside the current social-circle of extention-selves. So feels a selfish urge to expand these social-circles to incorporate… Well, shit, just about everybody, and while it’s at it, inanimate objects, like the world. All to forge bonds of altruism, indirectly (and perhaps vainly) to help create a world in which people are more likely to help eachother, and in particular - to help baby-self (and future-selves) survive.
So to get back to us/them, I’d say there’s a natural tendency to drift toward an eventual regardment of everybody (and possibly everything) as us-us. For the benefit of future us’s.
Kinda, maybe, perhaps.
[size=75][Quite a high baloney-rating to this post… ][/size]