Gibbon offers an explanation for why the Roman Empire fell, a task made difficult by a lack of comprehensive written sources, though he was not the only historian to tackle the subject. Most of his ideas are directly taken from what few relevant records were available: those of the Roman moralists of the 4th and 5th centuries. | The History Of The Decline And Fall Of The Roman Empire Vol. 2 by Edward Gibbon, Paperback | Indigo Chapters