In truth, the dominant foreign policy in the Republican Party, and to a degree, in American society as a whole is neither neoconservativism nor isolationism. For lack of a better name, it is what historian Walter Russell Mead has referred to as Jacksonianism, after Andrew Jackson, the seventh president of the US. As Mead noted in a 1999 article in the National Interest entitled, "The Jacksonian Tradition," the most popular and enduring US model for foreign policy is far more flexible than either the isolationist or the neoconservative model. According to Mead, the Jacksonian foreign policy model involves a few...