Nice one.. This is my kind of post.
My take on this is that marrying a number of countries together would have been a fantastic idea, if and only if, the people who'll lead the resulted mega-country are selfless and not greedy. Nigeria is where it is today ultimately because of greed, then sentiments and all others come afterwards. Most underdeveloped nations remained underdeveloped not because they lack resources for a speedy development but because their leaders lack the political will to develop those nations.
You mentioned America; America is driven by the will to be the most powerful state in the world at all times. Please what drives Nigeria?