cultural/geopolitical divides will always be present.
So you keep saying, but I haven't so far seen any real argument to why it is so.
people like having a "national" (again, substitute your favorite divider here) identity.
No, people like belonging to a group. If they can either identify as belonging to humankind or being a citizen of Earth (which is not in any way less arbitrary group to belong to than a nation), or if they can satisfy their need for belonging in another fashion independent of governance, then the sense of belonging given by nationality would be redundant.
every attempt at a single world empire has failed.
a. pointing at a series of negatives does not prove that it will always fail.
b. every single empire in the world so far has failed regardless of whether or not they attempted to be a "single world empire" or not. In fact, one could argue that no empire so far has even attempted to be a single world empire.
c. Empire would be a completely bass ackward way of establishing a world wide governmental system, considering that empires subvert other regions under their rule rather than form an united government based on equality.
the closest thing we have to world government now is generally laughed at.
And that proves it shall always remain so? The United Nations is a valid concept, all it lacks at the moment is authority granted to it by national states.
The reason they don't have that authority is because the national states do not wish to give away any smidgen of their sovereignty. Losing independence is a valid concern only if one holds tight onto the concept of national states existing.
It's obvious that the world and its population wouldn't be receptive at this time to the deconstruction of national states and nationalism as an ideology. But you should be aware that great changes can happen relatively fast and unpredictably.
I sincerely hope some day national states will lose their meaning in the present sense, and become more of a part of cultural heritage, something that you can be proud of, but not something that would build an arbitrary wall of separation between everyone in your nation and the rest of humanity.
I believe national states are just a phase in the growing process of humanity. You're free to disagree, but consider what need would there be for national states when we eventually have to abandon our planet, provided that we survive in some way, shape or form up to that point...
hell, we have a hard enough time trying to run a global football league.
Amusing as this straw man is, it's also false - there's a very successful and popular global football league called World Championships Tournament, which culminates to World Championships Final Tournament every four years.
You may have heard of it.
This also has almost nothing to do with the conversation at hand, except that the teams there represent their respective nationalities.
Also - what karajorma said. Alien invastion would be cool.
