What long-term political factors led to the collapse of the roman empire?

people began to take more interest in government affairs.
people began to feel that government service was a burden.
people increased support of the army under the threat of invasion.
people increased support of emperors under the threat of invasion.

The answer is  "People began to feel that government service was a burden."

Explanation:

There are many factors of the decline and disintegration of the Roman Empire. One of them was the loss of a patriotic spirit of citizens. During the times of splendor, service in the army was seen as a hig duty among citizens. Serving in the army paved the way of great careers in politics for upper-class men.