Reason and Universal Commonwealth

The political ideal implicit in Spinoza's concept of Reason is a Universal Commonwealth, with respect to which a City, a Nation, or even a Global Village, is contingently limited in spatial scope.  Often glossed as 'universal peace', this ideal does not preclude the possibility of discord, which, as internal, would be a violation of some law, not an outbreak of war.  Furthermore, while Humanity may be giving few indications of approaching a condition of universal peace, the long-term historical trend is plainly in the direction of an at least Global Commonwealth, i. e. from, as the basic unit of Political Philosophy, the City of the Ancients, to the Nation of the Moderns; the emergence of the United Nations; and the accelerating internationalization of Economics, Communications, and Transportation.  So, in a few more centuries, Nationalism may become as quaint as City rivalries are these days.  And, if, as Plato or Spinoza can never more than barely imagine, Humanity transcends terrestriality, an overarching Commonwealth will become more than Global.  Such a possibility, while familiar fodder for speculative fiction, is also implicit in Spinoza's concept of Reason.