Name the short and long term causes for the fall of the roman empire

A short term was that the emperors started getting weirder and stupider, along with their descendants, along with the barbarians attacking and ransacking, so real bad there. The long term was, there was also lead poisoning, the romans became "soft" due to their adoption of christianity. (not hating on religion btw) Then there was the overall military, political, and economic decline.