Roads? Religion? Accent? Food? Which factor dictates where the North ends?
This is a great intellectual expercise to help student think about regions and how we define them. The article can help also inform some of their thinking since one of the main problems for students in drawing regional boundaries is a lack of place-based knowledge.
TED Talks Hans Rosling had a question: Do some religions have a higher birth rate than others -- and how does this affect global population growth? Speaking at the TEDxSummit in Doha, Qatar, he graphs data over time and across religions.