Also a Civilization could fall for any reason from killing the king to starting war inside
Explanation:
From the collapse of ancient Rome to the fall of the Mayan empire, evidence from archaeology suggests that five factors have almost invariably been involved in the loss of civilizations: uncontrollable population movements; new epidemic diseases; failing states leading to increased warfare; collapse of trade routes
A civilization may fall if an attack, shortage of food, or war happens. A disagreement in the government or disease may also make the civilization fall too.
