Here is a more complete list of signs that an empire may be in decline or at risk of collapse:
Economic Decline: A declining empire may suffer from a lack of investment in infrastructure and industry, as well as from the high costs of maintaining the military and funding wars. Additionally, the rise of other economic powers can challenge an empire's economic dominance.
Political Instability: An empire in decline may be marked by a succession of weak leaders and political instability, leading to a lack of clear leadership and direction.
Military Overextension: Engaging in numerous wars and conflicts can drain an empire's resources and manpower, making it difficult to maintain its military power.
Loss of Allies: As an empire weakens, it may lose support from its allies and partners, further eroding its power and influence.
Rival Superpowers: A declining empire may face competition from rising superpowers or regional powers that challenge its dominance.
Internal Division and Conflict: Internal divisions, conflicts, and political instability can weaken an empire, making it difficult to maintain its power and control.
Nationalist Movements: The rise of nationalist movements and demands for independence in an empire's colonies can weaken the empire and ultimately lead to its collapse.
Social Unrest: A declining empire may face social unrest, protests, and strikes, as people demand greater rights and freedoms.
Lack of Innovation and Adaptability: A declining empire may be slow to adapt to changing economic, social, and technological conditions, leading to a loss of competitiveness and global standing.
Declining Population: A declining empire may suffer from a declining population, which can lead to a shrinking workforce, lower productivity, and a reduced ability to project power and influence.
Environmental Degradation: An empire's failure to address environmental problems, such as pollution and climate change, can lead to ecological degradation, economic decline, and social unrest.
It's important to note that these factors do not necessarily occur in isolation, and the decline and collapse of an empire is a complex process that can be caused by a combination of internal and external factors.