There are many who complain that our geopolitics are all about the oil. Peter Maas wrote in his introduction to Crude World:
If we become less reliant on oil--which means becoming more conservation-minded and efficient, as well as developing renewable energy on a broader scale than is already underway--we will not feel a need to go to war for oil's sake, or to support a dictator for oil's sake.
They said the same thing in World War II; I just discovered this poster that lays out the question so graphically: Should brave men die so you can drive...?
Next: When You Ride Alone....