I think that his doctrine was influenced by what happened to Germany in WW2: they had a tremendous war machine, but were hobbled by a lack of oil. The U.S. had

I think that his doctrine was influenced by what happened to Germany in WW2: they had a tremendous war machine, but were hobbled by a lack of oil. The U.S. had enough domestic oil to wage any war they needed to, but diverting that oil to war would have wrecked havoc on the global and domestic economy. That's was the state of the Cold War and the state of things today: a strategy of maintaining economic levels while simultaneously waging war.