The 'common characteristic' of each Nation, on the International scene, is People.

Each Nation has its Government. Each Nation has political power. But, all Nations have 'a people'. Each nation has succeeded in giving itself a political Identity, viz., it has 'clothed' the One, i.e. the 'structure of a governing' relation with the 'Many', i.e. the 'Peoples' under its jurisdiction. In other words, all Nations, or all governments, are 'relational' affairs. By that, I mean the One governs the Many. It has to be that way, except for the Triadic form. There are no other ways of 'governing'. The One becomes institutionalized into a 'form of government' with power that relates to its People on the National scene, and relates to Other Nations on the International scene. On the International scene, the relation is one, or should be, of 'Equal Power'. Hence, the relation between Nations is a relation of 'equal power'. Nevertheless, Nations don't, or shouldn't, have an 'issue' with 'Identity', nor 'Power'. But, obviously, Nations on the International scene, because of their individual power, over their People, cannot be 'unified' by means of their Political Identities. Why not? Because the retention of their 'political identity' as Nations, is a retention of their attributive 'power', over their People. That's why you can have a 'United' Nations but, not a 'United Nations', constituting one Great, Large Unified World Nation. To be sure, there's a difference. Consequently, the only way to 'unify' world governments, is to Unify the common characteristic of all nations, to wit; the human condition. In unifying, the Free and Equal 'human condition', we unify the world of Humanity. Why not? All humans are Free and Equal. Of course, there's always that old die-hard, that lays claim to superior race, or intelligence, but lets hope that they will continue to dwindle, or fade away. The truth of the matter, is that no government 'creates' its People, and consequently, governments have a 'right and power' to 'govern', because ultimately, 'government' was 'created' by the People, and hence, no one 'individual', nor 'government', can judge the superiority, or inferiority, of the human race, or of any one race. Hey, humanity is here to stay, unfortunately, it may destroy the world, but it won't be because of any one Superior Race, or Superior government. It will be from some 'self-centered','selfish', 'power hungry', politician. Where are the Statesmen?