There is no aspect of a people's collective life that may not have to be abandoned for the sake of meeting a practical challenge, just as there is no aspect they may not have to jettison in order to deal with the visionary appeal in politics. Consequently, the different forms of social life that exist in the world are always less real than they seem; the differences among them subsist on a containment of conflict. If the nations of the world were exposed to constant practical and visionary conflict, none of the differences among them would have any permanence. This does not mean that the peoples would become alike; it does mean that the marks that distinguish their identities would constantly shift hands and that other marks, never before dreamt of, would suddenly appear.