Dale Amon may have hit on the goal of US foreign policy under the Bush Administration. It isn’t about empire – it’s about disentangling the US from places like the Middle East, Europe, and Korea. In Mr. Amon’s words: "the return to Fortress America."
Could this be the overall plan? It is possible, and it does have its advantages. However, I don’t see disengagement as being possible. In an age of terrorism all the missile shields and naval forces in the world cannot prevent conflict from striking directly at this nation. However much one might like for the US to disengage itself from the world, the results of that would likely only decrease our security.