The causes of the decline of the Roman Empire are controversial and are often considered to be a result of several events building over time. There was no one "cause". As famous author and historian [[Will Durant]] states, 'An Empire is not conquered from without, until it has fallen from within.' | The causes of the decline of the Roman Empire are controversial and are often considered to be a result of several events building over time. There was no one "cause". As famous author and historian [[Will Durant]] states, 'An Empire is not conquered from without, until it has fallen from within.' |