It is akin the age of exploring countries to spread Chrisianity [and acquire wealth and control trade on the side]. Our effort seems to be to make sure that no other country becomes 'the Empire'. This will be successful for us as long as 'the war' is on the battlefield of armies.
'The war' today is one where the future will go to ideas. The past non-military growth of Christianity comes to mind. Also the triumph of marketing over communism. I believe Bush has mis-framed the future with 'people want freedom'. I believe it will be framed into 'people want justice'. And that should be the driving force of our 'Empire' - the unugly American.