What are the two major causes of the decline of the Roman Empire?
Ther are many many causes for the slow but inevitiable decline of the Roman Empire and these lasted hundreds of years. Rome outgrew herself and it was next to impossible to administer far flung provinces in a timely and efficient manner. They were also unable to check the advances of northern/eastern tribes pushing into Roman territories. Couple this with famine, plagues, cash short-falls and the division of the Empire and well… you see what happened.