The Romans kept the Barbarians at bay for as long as they could, but finally they were engulfed and the savage hordes overran the empire, destroying the cultural achievements of centuries. The light of reason and civilisation was almost snuffed out by the Barbarians, who annihilated everything that the Romans had put in place, sacking Rome itself and consigning Europe to the Dark Ages. The Barbarians brought only chaos and ignorance, until the renaissance rekindled the fires of Roman learning and art.
It is a familiar story, and it’s codswallop.
I expect Mr. Jones to handle the material with scholarly attention as well as a touch of the sort of humor you'd expect from a man who once played a Hammond organ in the nude for laughs.