What factors caused the fall of the Roman Empire?

Septimius Severus was probably the most ruthless. He ran the empire as a military dictatorship. His campaigns against the Caledones in what is today lowland Scotland depleted their numbers to the extent that they disappeared altogether as an independent tribal grouping,and the Picts replaced them in the mid 2nd century AD as the dominat tribal grouping in Scotland.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.