Explain the political and economic changes in western europe after the fall of the roman empire in the west?

The fall of the Roman Empire plunged Europe into the Dark Ages and decentralized the region. The Imperial system in Rome was replaced with a loose-knit group of kings and princes throughout Europe. Some experts believe the fall of the Roman Empire was necessary to dismantle the old Roman slave system in favor of equitable societies...  Hope this helps a little bit (:

1) she is extremely upset