Are Americans eternally optimistic?

Americans always seem optimistic and seem to have an optimistic view of the future.

Despite all the hardships that this nation may face they always seem to move forward and overcome the hardships.

I have friends who went to the USA who told me something like this: "Americans are always smiling and welcome you with kindness and good humor. They are quite open to foreigners and to discussion."

In my country and perhaps it is the case of the majority of the countries of Europe this optimism does not exist or not at all at the same level. If I had a caricature, I would say that Europeans live in a Greek tragedy and that Americans live in the world of Disneyland.

Of course Americans are not "dumb optimists". They know the hardness of life and the tragedy of this world, but they seem to have found a better solution than the Europeans to overcome the difficulties of life, and it has enabled them to achieve incredible things.
Are Americans eternally optimistic?
Are Americans eternally optimistic?
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