"Saying that America is the greatest country means that every American takes pride in it, even though he/she has contributed NOTHING for the fame of the individuals."
I GUESS YOU'RE TRYING TO SAY that losers always try to attach themselves to winners even in the most tangential and ultimately meaningless ways, but while that is true, it is also irrelevant to the point.
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One can say that America is a great country, but I would never accept the claim that there is such thing like a "greatest country". You got it?
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If there is no such thing as a "greatest country" then there is no such thing as a "great country". Both require an ability to measure countries against each other and one is going to have the highest "score".
We have the best record on first refining, then spreading human rights, humanitarian aid, and -- most of all -- political and economic freedom throughout the world. Our record is not flawless in that regard but even so, whoever is second to America under these criteria is really a distant 40th.
If that isn't the measure of a great country, then you're right, there is no such thing. What other measure is there? Who makes the best cars or food or has the best weather is rather petty by comparison...
If you wanted to say that there is a greatest country, you should point out the measures, right, you did so. But I say one cannot compare nations in regard to finding acountry with the highest score. I do think that one can compare countries into classes (like great, valuable and non-valuable countries), e.g. say that Tunisia or Albania are no great countries, because they have and never had much to contribute to the advance of humanity. But since one has to put in different factors in the measures, like size, number of inhabitants, raw materials, inventions, circumstances of inventions, etc saying that one country is greater than other great countries is pure arrogance and does more harm (-> the individual feeling superior even though he isn´t) than use. I cannot create a fair list which shows the "greatest nation", can you? There is no "greatest nation" because it´s impossible to do such a list. You may have categories, but that´s all. Continuing to say that American men are the best men is therefore arrogance, and nothing else.