Costa Rica might be considered an especially nice country but it is too small to be called the "greatest" coping with our own sheer size causes problems we are proud to have . Is it fair to contrast the innocence of one country with another and proclaim the more innocent the greater?
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This is like saying that Budweiser is the greatest beer in the world because they sell so much of it. (I mean the American Budweiser, not the little-known German one that the US brand took its name from).
Why does size have anything whatever to do with greatness?
I suppose the next criteria for you would be wealth. But then, Luxembourg, Qatar and the UAE have the US beat in per capita income.
And, yes it IS fair to discuss innocence. Costa Rica abolished its army when the army kept taking over the government. Costa Rica has never invaded anyone. Neither has Bhutan.
New Zealand seems pretty cool and well-run and prosperous as well. Canada is a cool country, but a tad too cool-downright frigid-for many.
I don't really think that comparing countries to the degree that there is a firm ranking. The US is perhaps th4e greatest country for someone who likes working on American military aircraft, living off checks from the government, and then voting for the party that thinks that the very government that pays him all those checks is the basis of most of the problems. So I will not dispute that the US is the greatest country for Plane.
I live in the US because I am an American, I own my own home, and I rather like where I live. My family and friends are here. Still, I have found Spain, Mexico,Argentina and Costa Rica to be much friendlier places.
The anti-intellectual aspect of US culture sucks quite deeply. It is really annoying to have some dolt who knows little more than sports data accuse anyone who actually reads and thinks of being an "elitist". This is, to my mind, as dumb as accusing rich people of having more disposable income, or mechanics of understanding engines better.
Costa Rica has very few military aircraft. I am not sure that Bhutan has any. I suppose that New Zealand's military is more like a coast guard.