I wouldn't be so sure about the Dark Ages - Attila, e.g., didn't burn the libraries and tried to get the idiots work with him for months before he actually sacked Rome.
The Dark Ages arose b/c the slave economy destroyed the incentive to be civilized. Why should Germans support Rome when all they get is taxes, lies, and slavery? To support the elite/welfare complex on the Med.
Actually - it sounds like today - and the German "barbarians" really want the EU "Rome" to go "Dark Age" and more power to 'em!
Whatever happens - the Howard Zinn's of the future will blame German engineers for not supporting the "Civilized" EU and call it "Dark Age 2" even while the Germans are leading the fight to save civilization.