Even the dark ages were not one day "perfectly working Roman Empire" and the next one could not even find fresh water. It was much more of a slow decline of thi

Even the dark ages were not one day "perfectly working Roman Empire" and the next one could not even find fresh water. It was much more of a slow decline of things going into disrepair and people losing track of ideas and technology due to ever growing isolation and too busy to focus on academia from the lost of technology/infrastructure efficiencies/safety the Empire brought.