I really shouldn't feed the RB trolls, but OK, I'll bite.
Can't be arsed with this British 'ooh look at us, we're such an old country and steeped in history, etc' bollocks. As if that actually, collectively makes us a better bloody country or place to live. Get real, grow up gentlemen.
While us and the other Europeans were busy trying to build our Empires, they were busy building their own country. That tends to focus you inwards as a people, not outwards and with a country as large and rich in natural resources, they've historically had no need to look very far beyond their boundaries.
Remember America was built on the backs of immigrants and cheap labour (and I suppose still is). I'll argue that these people came looking for a new and better life and left the past in the past. But having said that, I've lost count of the amount of Americans I've met who claim to be Irish or Swedish, based on a great-grandfather or other ancestor coming from over there. Which is kind of interesting - as a country they may have a reputation of not being aware of big wide world, but that's not the case when you talk to American Murphys and the Lundgrens.
Got to say, there's a lot to like about America and Americans. I think it's a fantastic place, with some great people.
And their national anthem kicks ours into a cocked hat.