Let's create a clash between two (1) ________ high schools. It's lunchtime at City Academy, the football team eats with the (2) __________ . The (3) ______ are playing cards. The popular kids are playing guitar and the art club are reading poetry to each other. These different groups aren't mixing and they aren't really (4) _____ to either. The social groups (5) ______________ based on aspects of themselves they believe to be (6)____________________________________ . Civilizations share (7) ____________________________________________ . There is an easily (8) ________ 'us' and 'them' both in global politics and in the lunchroom. School's out and the clicks from City Academy are (9) _________ with the clicks from Hill High School across the road. The football teams play a match, the nerds compare math notes, the guitar circle has doubled in size and the art club have formed a poetry group. This is the (10) _________ of things until the (11) ___________ comes to town. There's (12) _____________________________ and both schools want to win. Next day the lunch tables at both schools look very different. The different groups are sitting around the same table (13) __________________________ to work as a team. The art club are in charge of painting, the nerds are (14) __________________________ , the cheerleaders are (15) ____________ , and the popular kids have recorded a song. The contest has changed the basis of association and antagonism. They have become allies against (16) ___________________ , the school across the street. Parade day comes and City Academy takes home the prize. Days later having put aside their cultural differences to support an ideological cause, they're (17) _________________ . In the case of international conflict, Huntington believed the same thing happens. Countries pull together and cooperate when fighting for (18)____________ , for instance, in times of war, but Huntington believed that (19) ________________________________________ .