Species and Egoism

If the Species-Member relation is that of Whole-Part, then what is usually characterized as 'Psychological Egoism' is inadequate.  For, on that premise, it is a principle of Species-Diversification that distinguishes one Member from another.  Furthermore, just as Diversification is indefinite, i. e. A can vary from B slightly, drastically, etc., so, too, is the degree of distinction between two Members.  On that basis, Psychological Egoism abstracts both from the commonality of ground of two Members, as well as from the infinite varieties of difference between them.  Thus, even the standard simplification, namely, the Hobbesian concept of an absolute antithesis between all Members, is still only a superficial representation of a special, extreme, case of the internal Diversification of the Species, i. e. is an inadequate concept of that condition.