Answer:
Invasions by Barbarian tribes. ...
Economic troubles and overreliance on slave labor. ...
The rise of the Eastern Empire. ...
Overexpansion and military overspending. ...
6 Reasons the Dark Ages Weren't So Dark.
Government corruption and political instability.
Encyclopædia Britannica, Inc. All the major ancient civilizations—in Mesopotamia, Egypt, the Indus valley, and China—emerged in the 4th millennium bc. Historians still debate over which one emerged first. It may well have been in the Middle East, in an area called the Fertile Crescent.
