The '' New York Times '' obituary on Samuel Huntington notes , however , that his " emphasis on ancient religious empires , as opposed to states or ethnicities , as sources of global conflict gained ... more cachet after the Sept. 11 attacks . " Huntington wrote that Ukraine might divide along the cultural line between the more Catholic western Ukraine and Orthodox eastern Ukraine : While a statist approach highlights the possibility of a Russian-Ukrainian war , a civilizational approach minimizes that and instead highlights the possibility of Ukraine splitting in half , a separation which cultural factors would lead one to predict might be more violent than that of Czechoslovakia but far less bloody than that of Yugoslavia . Huntington 's last book , '' Who Are We ? The Challenges to America 's National Identity '' , was published during May 2004 . Its subject is the meaning of American national identity and the possible cultural threat posed to it by large-scale Latino immigration , which Huntington warns could " divide the United States into two peoples , two cultures , and two languages "
Sept. 11 attacks
September 11 attacks
Samuel P. Huntington