As you may know, there is no such thing as a modern Arabic language. Rather, we have a sort of continuum of dialects, where regional varieties can accurately be described as separate languages: Maghrebi, Libyan, Egyptian, Yemeni, Gulf, Iraqi, Levantine. MSA was created about 100 or so years ago, and is the most common way for modern Arabs to communicate with each other (at least for those who are educated and literate). What if MSA was never created? Would each of these language go hand-in-hand with regional nationalism? What does that spell out in the Cold War? Would we even see a Pan Arabist movement?