Don't say things you know nothing about! European countries comunicate/cooexist/trade, ... long before USA existed! It is true that each country pursue his interest, but we are in a changing phase, lots of things are being made to help to reduce that flaw.
I'll tell you why EURO is stronger that DOLLAR, because the USA has a big and non stopping climbing debt, has you can see in the following web page: http://www.usdebtclock.org/
Europe has countries with a positive balance, with 0 debt, the ones that have big debt are small countries....
I speak about common history, where they have 1 group all or majority states (we have SSSR, Österreich-Ungarn (in English original name I donīt know how it write), Big Roman Empire ... but this is something else!). 
