Did the Roman empire fall because of internal or external problems

an informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.

answer; /// direct cinema limits the use of narrators; ; ; and: : : : allows the audience to observe events as they occur;