[QUOTE=ralph124c]
Other factors (in the fall of the Empire):
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- necessity of grain importation; Italy could not feed itself, imports of grain from gaul and Egypt were necessary to feed the population
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-importation of religious cults (like Mithraeism, cult of isis, etc.0; lack of adherence to old Rom,an religion favored disunity
-loss of trade: as the empire shrank, piracy emereged 9in the 4th century0; this reduced trade and tax revenue; eventually, roads became dangerous and trade reverted to barter between villages 9early feudalism)
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Again, a few small points:
Italy had been unable to feed itself since the empire’s very height; this was not a late development. Food crises occurred even in the Republic, when Rome’s ‘empire’ was comparatively small.
Piracy, similarly, had been a problem since Republican times, and periodically flared up. Thus these two things were merely constant factors in being an empire; they cannot really have ‘caused’ the fall.
Finally, religious cults had been ‘imported’ since at the very latest 186 BCE - the bacchic cults. There was a lot of rhetoric from as early as then about ‘eastern’ cults, but they were very popular at all times - the emperor Augustus himself was initiated into the Eleusinian mysteries at Athens. Mithraism’s origin is obscure, but probably arose within the empire. And finally, there is no evidence that anyone particularly ‘failed to adhere’ to the state cult - it was going strong in the countryside, in its way, and in Rome itself, even after Christianity had become the ‘state cult’. The ‘lack of adherence’ idea was one propagated by the pagans themselves to explain their loss of state power and other evils besetting the state. But this ‘elite’ perspective does not take into account the large number of lower-class pagans who had carried on their traditional practices without a blip.
Eastern religious ideas were incorporated continuously into ‘Roman religion’; paganism simply is not exclusive and did not demand, unlike Christianity or Judaism, abjuration of any cults or gods.
I really think framing the question this way is misguided; it leads to glib theses which encourage people to make false analogies with other times and places: ie ‘slavery is bad - look what happened to the Romans’. Obviously, slavery is bad. But saying it ‘caused’ the end of the Roman empire is really really oversimplifying.
Sorry to go on at such length, but let’s just say I have some ‘professional’ interest in this question.