Normally, I would not waste time and effort arguing about the motives behind the War on Terrorism -- what is most important is that we fight against this War on Terrorism. However, there is a lot more at stake here than simply greedy imperialism. The U.S. empire and modern civilization are all made possible by oil. Without it our technology would never have grown beyond coal-based industrialism. Furthermore, there are no alternative energy sources, which, considered separately or in total, can replace oil and natural gas.
As oil and natural gas production decline, so will the economy and our technological civilization. Without oil and natural gas modern agriculture will fail, and people will starve. Without oil and natural gas, industry will grind to a halt, transportation will be grounded, and people in northern climes will freeze in the winter.
Scientist Richard Duncan has created a model that has so far gone unrefuted. His model states that technological civilization cannot outlast its resource base, particularly its energy resource base. Once this resource base is exhausted, technological civilization will be forever beyond the grasp of life on a particular planet. Duncan makes his model readily available to anyone who wishes to test it in the hope that someone will be able to successfully refute the model. To date, no one has done so. (See "The Peak of World Oil Production and the Road to Olduvai Gorge"
http://dieoff.com/page224.htm)
You see, there is a lot more at stake here than just a continuation of the Cold War or U.S. imperialistic greed. There is enough energy remaining in the world right now for us -- the people -- to take control and ease ourselves into a democratic, egalitarian, stable-state society. Or there is enough energy for the elite to build a feudalistic, fascist, police state with themselves at the top. This is the choice facing us right now, and this is what is truly at stake.
http://www.fromthewilderness.com/free/ww3/080802_oil_empire.html