The document discusses how language, ethnicity, and religion can both link and divide regions of the world. It provides several examples:
- The Arab world is largely unified by the Arabic language, while countries like Iran do not share this language. Hispanic America shares the Spanish language.
- Ethnic conflicts have occurred in the Balkans, Rwanda, and Cyprus due to differences between groups like Serbs/Croats/Bosniaks, Hutus/Tutsis, and Greek Cypriots/Turkish Cypriots.
- Religious differences have caused conflicts over Kashmir between Hindus and Muslims and in Northern Ireland between Protestants and Catholics, while Jerusalem is claimed as a holy site by Jews, Christians