I don't think there is a dominant culture in the US. The power of the American culture is it's ability to assimilate other cultures and integrate them in.
> I don't think there is a dominant culture in the US.
I think that's a stretch. You will note that most of the country, from business to government to IT, is run by people of the same skin color, socio-economic class, and gender. Those people also fill higher education (sans the gender) the stepping stone to opportunity too. Look at photos of the US Senate, Fortune 500 CEOs, etc.
That doesn't make them the same 'culture', however the word and its groupings are defined (it's always nebulous), but clearly there are cultures that are largely excluded.
