“Wars rarely have one clear and singular purpose, and the Iraq War in particular was driven by different agendas prioritized by different factions. To say it was fought exclusively due to oil is an oversimplification. But the fact that oil is a major factor in every Western military action in the Middle East is so self-evident that it’s astonishing that it’s even considered debatable, let alone some fringe and edgy idea. Yet few claims were more stigmatized in the run-up to the Iraq War, and after, than the view that oil was a substantial factor. In 2006, George Bush instructed us that there was a ‘responsible’ way to criticize the US war effort in Iraq, and an ‘irresponsible’ way to do so, and he helpfully defined the boundaries.”
http://www.theguardian.com/commentisfree/2013/mar/18/david-frum-iraq-war-oil