Romans in Post Roman Britain-Could You Keep Your Lifestyle?

from the Diocletan period (286 AD)

Truly, the Romans were civilized.

I take issue with some of your claims. The Greeks had a very similar numerical system to the Romans, and Archimedes damn near invented calculus. The literacy rate in the Roman Empire at large was much more literate than that of Europe in the early Middle Ages, shortly after (and before) Rome fell. The Dark Ages can be considered dark because there is almost no written record from within them, and not much is darker within Western Europe than post Roman England. The re-establishment of Christianity within Anglo Saxon Britain was important because it at least established a literate veneer, and that helped Anglo Saxon Britain develop a more sophisticated civilization than their continental peers, but then their continental peers could be considered to have undergone one long, slow, sad decline interrupted only by the Carolingians, until the High Middle Ages.

That said, I agree, it was a good thing that the Roman Empire disappeared, for the reasons you state, and it also permitted the establishment the much more dynamic and freer civilization of the High and Late Middle Ages.

Of course that took many years to arrive. In the period and just after the decline of the Western empire, the standard of living was pretty dire in Britain for a few hundred years.

The FT has this comparing the current recession to the end of Roman Britian. They describe it as effectively as 1600 year recession:

I decided to look at The Ending of Roman Britian (2000) by Dr. Simon Esmonde Cleary to get an idea of what life was like as Roman civilization in Britain crumbled.

Cleary cites evidence that villas, town houses, and baths were being abandoned, presumably as Romans and their cohorts fled during the later part of the 4th century. He also states that there’s evidence that similar declines took place around the same time in Gaul and the Rhineland. The situation had become dire during the early part of the 4th century; Alamanni, Vandals, and other Germans teamed up to attack Gaul in late 406, forcing Constantine III to go on the offensive. He was moderately successful for a few years until the Roman commander Constantius beseiged him at Arles, captured him, and had him executed. We know from literary evidence that the Britons and Gauls had also rebelled against their Roman masters in 409, driving out Roman officials. In 410 Britain was attacked by Saxons, and the emperor Honorius wrote to the poleis, or cities of Britain, telling them to arm themselves. The emperor seemed powerless to actually assist the Romans in the area.

We know from The Life of St. Severinus that the titular saint came to Noricum Ripense (now part of Austria) in 452 to find there were scarsely any *limitanei *(Roman frontier infantry) still guarding their garrison. The soldiers stated that their payment had stopped, and the soldiers sent to Italy to see about getting it reinstated that been murdered en route by barbarians. As a consequence, the garrison wittled away to almost nothing. Probably something similar happened to the *limitanei *in Britain.

By the mid-440s, Britain was under seige by the Saxons. In 446, the Britons appealed to Aetius, the last effective Roman commander in Gaul:

To Aetius, thrice consul… The barbarians drive us to the sea and the sea drives us back to the barbarians. Between these two types of death we are either slaughtered or drowned.”