Why did the Roman Empire fall apart?

Related questions

1. How did religion affect the Byzantine Empire?
2. Why is the Byzantine Empire important?
3. How did the Byzantine Empire rule with religion?
4. Why did Vladimir convert to Christianity?
5. Why are icons used in Orthodox churches?
6. Is purple made from snail snot?
7. What does Byzantine refer to?
8. Why is Christianity divided?
9. How did Charlemagne's empire differ from Roman and Byzantine empires?
10. Why was the Byzantine Empire important?

Tags

1. #goths
2. #borders
3. #centuries
4. #forces
5. #western
6. #sustained
7. #tangled
8. #groups
9. #losses
10. #germanic
11. #invasions
12. #outside
13. #encroached
14. #empire
15. #straightforward
16. #against
17. #theory
18. #beyond
19. #barbarian
20. #military
21. #string
22. #tribes
23. #collapse