LOL They should ban mentioning Europe on FR because it encourages freepers to write rubbish such as this.
There were a whole raft or reasons why some stayed and some left to go abroad.
And major difference between American and European society may have something to do with the two major destructive wars that were fought on European soil, in both occasions part of Europe was reduced to almost stone age living .
Not just the World Wars either. Europe has had a run of bad luck (Huns, Mongols, Romans) not to mention the Crusades and Jihads. I suspect in the end it was all about logistics.
No, the our philosophical differences run much deeper than the unpleasant consequences of your frequent continental urban renewal programs. To some degree de Tocqueville understood this and, to some degree, so do many here on FR. America isn't a racial, ethnic or cultural ideal; it is the great experiment for all freedom loving people. Not that being a socialized hamster is all that bad, it's just not our cup of tea...