One longstanding predicate of U.S. foreign policy in the Middle East -- that America's military presence in the Persian Gulf region protects the free flow of oil -- is false. That is according to University of Pennsylvania professor Robert Vitalis, along with a growing academic literature scrutinizing the claim. Because of the global nature of the oil market, even infamous past disruptions, such as the so-called Arab oil embargo of 1973, have not had as significant an effect as commonly believed. This erroneous basis for U.S. strategy, Vitalis explains, also justifies a misguided emphasis on Washington's close relationship with the Kingdom of Saudi Arabia, among other costly consequences.