Prior to the World Wars -- Americans were a simpler, isular and insulated people. By the close of WW-II, Americans found themselves at the center of World affairs -- both as the only surviving economic power, and as the military Superpower -- grown over-confident.
As a people we've plunged into conflicts ever since. Wielding the might of an omnipotent military threat (one that has progressively emptied the US Treasury). Have you ever stopped to ask yourself what percentage of American assets, aren't "American" anymore? America had become the Goliath of the planetary economy during those equally devastating World wars.
Al-Kaida has become the David, armed with a sling. Are westerners going to be taken down by a stone?
And so it is,