1. Who were mainly involved in trade?
2. What type of architecture developed in cities?
3. Why were rivers important for cities?
4. Who were artisans?
5. What was a common occupation in cities?
6. How did rulers maintain law and order?
7. What role did religion play in cities?
8. What was a main source of revenue?
9. What was an administrative feature of new states?
10. How did cultural exchanges happen?