To say that something's not bad is not to say that something is ideal. To anyone whose worldview isn't completely dominated by cranks on shortwave and/or has actually moved outside of a 50 mile radius of where I live in the past ten years would understand that many places on earth outside the US are more or less decent places to lives.
I've only said here that existing trends will probably lead towards greater international political and economic union and this isn't an issue of sentiment but rather of effiency.
People will spend whatever they can exchange for goods and services, be it dollars, yen, or euros without regard to nationalist sentiment. People will buy needed goods and services from wherever those goods and services are produced. We can make this process hard or we can make it easy. Making it easy means coordination of economic and political policies. Making it hard means introducing increaingly artificial speed bumps at national borders. No nation will be completely self-sufficient in the future. Look at how will juche has worked for North Korea or any other nation that tries it.