Reading through this debate for a few times, makes me itch to correct many assumptions people hold about the effects of colonisation.
Dogsi, for one, has misconceptions about colonisation and its impacts. Subjugation of the colony's economy, people, rights for the benefit of the Conqueror is the main reason for colonisation in the first place. It's a practical side to life, we can't all afford to be purely altruistic always.
Besides that, America and Russia are actually anti-imperialist. Read Woodrow Wilson's 14 Points made after WWI and also know that Roosevelt told Churchill(UK) to give up it's empire after WWII. However America has some times betrayed its founding principals in trying to progress, so it's not entirely impossible for it to turn imperialistic. I'm not trying to critisise America here, but to state that on relative and subjective issues such as Rights, Liberty, Democracy, Equality, it is inevitable that there are clashes.
You would think the fact that throughout both Asian and European history, countries never stayed colonised for long, as well as the fact that 2 World wars occured because of the direct impacts of Imperialism, would be proof why World under one rule (WUOR) will not work. Mel Gibson's William Wallace and his "Freeeedommmmm!" wasn't just limited to Scotland. William Wallaces surfaced in many forms, people, countries, cultures and so on. Your neighbourhood nationalist is a Wallace in disguise, sans face paint.
But for now I shall just post a short argument on why the World under one Rule will be disastrous.
The biggest problem will be the sheer size (pun pun) of the land under control. If you take notice, the world's biggest countries like China, India and Russia suffer from a multitude of problems that comes with the governments being unable to have effective total control.
Governments normally have a centralised bureaucracy, and control delegated to various regional/provincial governments.
There's a chinese saying that goes, "The mountains are high and the Emperor is far away."
Distance and the vast number of regions, will shield many provinces from the focus of the Central Authority. And since the Central Authority isn't watching, the provincial governments, as well as the people themselvs can pretty much do what they want.
Recent examples include Shanghai, where several top officials (including the Governor of Shanghai) are under persecution for embezzlement and corruption. Classic example of mountains high and emperor far away.
Indonesia too suffers greatly from the government's inability to have effective control. Indonesia is made up of thousands of islands, can you imagine the headache in trying to govern all of them?
One very recent case in point is the haze issue, SEA countries were affected by the smoke coming from Indonesia due to clearing of land through burning. Imagine again living among the clouds, except that the clouds are filled with soot, sulphur, carbon dioxide etc etc. It's more than an irritant, it's a health hazard. ASEAN tried to force Indonesia to tackle this problem for years with no result.
That's because the different provincial authories aren't doing much to follow what the Central Authority says. Farmers, companies could just set fire to a land without anyone knowing, and even the provincial government can't control them.
Added proof that smaller countries are more efficient and less corrupt? Look at the rankings of the Corruption Perception Index. You'll notice that the chart-toppers are relatively small countries.
http://en.wikipedia.org/wiki/Corruption_Perception_IndexIceland, Finland, New Zealand ranks as the top 3. (Maybe we should name countries to end with -land.) Iceland's population is under 500,000. Finland under 6m, New Zealand under 5m.
There are so many inherent flaws in the idea of world under one rule, it'll take me days to list them all and that's not even going into the classifications of indirect or direct rule, economic or millitary imperialism.
Besides, who's going to be the absolute ruler? Let me quote Machievelli here, "Power corrupts, absolute power corrupts absolutely." It's like wearing the ONE RING (to rule them all) in LOTR. Even our favourite Gandalf isn't impervious to the effects of being all-powerful.
This topic is fun to debate, although I have a feeling that I'm posting this for my own benefit since I may be the only one interested enough to read my post.
"Perhaps no person can be a poet, or even enjoy poetry, without a certain unsoundness of mind."- Thomas Babington Macaulay