why Rome fell?

1. Why does our textbook argue that the “moral answer” for the fall of Rome is not a sufficient explanation? Do you agree or disagree with this conclusion? What other explanations do you find particularly convincing for why Rome fell?

Some scholars have noted as many as 200 different causal factors for the fall of Rome. Which one was the final straw that  broke the camel's back? Or is it that all of them together were necessary for the fall?