Evolution, Survival, Political Philosophy

A significant unclarity in Evolutionism is whether the drive to generate more complex entities is a means to Survival, or is for its own sake.  The distinction bears upon Political Philosophy.  For, if Evolution is a means to Survival, then social progress aims at some permanent optimal condition, e. g. Kant's Cosmopolity, Socialism, etc.  But, if Human History is a prelude to the arrival of some new, more advanced Species, then it might aim at a social order that is the breeding ground of the relevant mutation, and what such a Polity might consist in seems to be anybody's guess.  So, Evolutionism reduces Political Philosophy to a contingent, temporary project.