How did the environment and technological innovations affect the growth and contraction of the Roman Empire, the Byzantine Empire, and medieval Christendom? What impact did human expansion have on the environment?
How was Rome a site of encounter?
How did the Roman Empire gain and maintain power over people and territories?
How did the religion of Christianity develop and change over time? How did Christianity spread through the empire and to other cultures?
Did the Roman Empire fall?
How did the decentralized system of feudalism control people but weaken state power?