Did wider human expression cause Rome's fall?

Did greater material security and wider human expression cause the Roman Empire to fall?

Not really: in this interpretation, they were a symptom of decline rather than its cause.

The Roman Empire's fall involved a complex mixture of issues. In Rome especially, many people had reached a point where they could think beyond obtaining a meal and a roof. That material security allowed other aspects of human expression to develop. In this interpretation, those developments were a symptom of decline rather than its cause.