" America's distinctive history - its ethnicity-transcending national identity and its unusual success in assimilating people from diverse origins - has shaped how we see the rest of the world and has deeply influenced our foreign policy. It's not just ignorance, racism, or arrogance that predisposes us to ignore ethnic, sectarian, and tribal divisions in the countries where we intervene. In the United States, immigrant communities from all sorts of background have become 'Americans'; why wouldn't Sunnis and Shias, Arabs and Kurds, all similarly become 'Iraqis'? "

― Amy Chua , Political Tribes: Group Instinct and the Fate of Nations