 In that system no ruler or state was sovereign in the sense of being supreme over a given territory and a given segment of the Christian population; each had to share authority with vassals beneath, and with the Pope and (in Germany and Italy) the Holy Roman Emperor above.The universal political order of Western Christendom represents an alternative to the system of states which does not yet embody universal government.Thus Bull suggested society might move towards "a new mediaevalism" or a "neo-mediaeval form of universal political order", in which individual notions of rights and a growing sense of a "world common good" were undermining national sovereignty.He proposed that such a system might help "avoid the classic dangers of the system of sovereign states by a structure of overlapping structures and cross-cutting loyalties that hold all peoples together in a universal society while at the same time avoiding the concentration inherent in a world government", though "if it were anything like the precedent of Western Christendom, it would contain more ubiquitous and continuous violence and insecurity than does the modern states system".