Looking at a world map, there are six continents with hundreds of borders that divide them physically and culturally. On one side of a border may live Armenian Christians who speak a millennia-old, indigenous language. On the other are Azerbaijani Muslims speaking a language with origins thousands of miles away. But how did these borders happen? How did they divide the land and its people, and what happened as a result? Divided explores eight instances where a partition shaped not just a region. But the world as a whole.