Héhé. It's funny to see how the story telling can be something very sweet...
Each nation is
special. There are just some that take the advantage on other ones, before their turn to be dominated, etc...
The destiny, you believe in it or not, but it works or not for everything, a butterfly, a stone, a human, or a nation.
If the question was: did America changed from the idea it had of itself at the beginning and of what it thought it should have been in the future? Personally, I don't know its history enough to answer.
To say something sweet to your ears, I would just say that maybe the US, maybe by putting freedom so forth during its history, and by giving some real accomplishment to this, achieved some things for the history of humanity, but US are not something which is born from nowhere, US is the fruit of an history of the world, it's just the materialization of a process which is a consequence of other things... (sorry, I couldn't be sweet that much
).