[diego_moita]

* Science and technology : big bang theory, anesthesia, Von Neuman computer architecture and it's implementation, telecommunications, most of modern molecular biology, Borlaug's Green Revolution, ... there is an endless chain of Nobel prizes on this one.

* Philosophy: the concept of philosophical pragmatism and big contributions to economic and political liberalism

* Music: Aron Copland, Leonard Bernstein, Gershwin, Duke Ellington, Jazz, ...

* Architecture: Frank Loyd Wright and a lot of contributions to modernism

* Literature: Hemingway, Faulkner, ...

If you want to talk about "customs", a mindset typical of a country that sets them apart from the other cultures you described, the most typical American trait is a pioneer belief, a radical optimism with very little regard for traditions. That attitude permeates the list above.

[aquadrop]

I think what you enumerated shows that "America"'s culture is immigration. Von Neuman was Hungarian, Arno Penzias (big bang) immigrated from Germany, Borlaug's ancestors came from Norway etc USA had influx of people from the beginning, both voluntary and forced immigration. It was "New World", where those who didn't like the old one or wanted to restart went. And it's ironic to see now Trump trying to cut off immigration.