Military, social, political, and economic are four factors of Rome's decline. All factors dragged down the Roman Empire since they all linked with one another. Military decline meant less people had jobs so people didn't want to have kids and during the time, people were suffering from the plague.
The reasons for the fall of the empire include military overreach, invasion by emboldened tribes of Huns and Visigoths from northern and central Europe, inflation, corruption and political incompetence.
