It led to a split of the Roman Empire into two parts (it was easier because now there were two capitals and it was easier to split the empire among those two capitals.
Then Western Part stopped existing and the Eastern Part continued until 15th century
Northern Africa is mostly desert, and it is extreamly hard to trade w/ the rest of Africa
Artisans were members of guilds in the later Middle Ages. They joined together to form guilds since individually they had little power to control the production of a particular craft.
The $200,000 in the given example above represents the revenue of the company
