50 POINTS! Please look over my answers!
(reposting because my other one got spammers.)
Invasions by Barbarian tribes - Political?
Economic troubles and overreliance on slave labor - Economical?
The rise of the Eastern Empire - Political?
Overexpansion and military overspending -Economical?
Government corruption and political instability - Political?
The arrival of the Huns and the migration of the Barbarian tribes - Political?
Christianity and the loss of traditional values - Social?
Weakening of the Roman legions - Social?