Related words: the crumbling power, the downfall of crumbling empires, how to maintain crumbling power, how empires crumble, what causes empires to crumble, what is the cause for crumbling empires, how do empires crumble
Related questions:
What are some examples of empires that have crumbled?
What is an example of an empire that has crumbled?
Why did an empire crumble?