One World Government?

[Shell B]

My problem with a one world government, well, my main problem, is that it seems you would lose the cultural diversity that we enjoy -- for lack of a better word -- today. I can't imagine a single government being able to rule all of the varied peoples on this planet. The thought is actually frightening to me. Let's say we do have a one world government, what are the chances that indigenous rainforest people will be represented in said government? They will become subject to laws that simply should not apply to them. They would be ruled by people who simply don't understand their culture. This would be true on varying scales throughout the world.