The Arab Spring erupted largely because many people in the countries concerned felt they had no stake in either an economic system that passed them by or a political system in which they effectively had little or no voice in the direction of their country. Many Americans are facing something similar with a pattern of economic growth that leaves them behind and an often dysfunctional political system that gives them little sense of having a role in setting policy. Americans are not likely to stage their own Tahrir Square. But it is unsurprising if they become increasingly disengaged from foreign policy and if, as Campbell anticipates, this becomes a source of weakness for the United States internationally.