Robot machines that do factory work a lot faster and nicer than humans
Answer: What exactly are you asking?
Explanation:
I believe there are lots of reasons why the Roman Empire declined but the 3 most important ones are, Government corruption and political instability, Invasions by Barbarian tribes, and The rise of the Eastern Empire, but the one I think is the most important is the first one reason.
Germany under Hitler and Italy under Mussolini