The "barbaric" formerly Corded-ware (yes I know all about that thank you) German tribes had enough of Roman elitism and took Rome over. Roman "culture", (if you want to talk about who is backward) degraded into sending captured slaves into colosseums to kill each other for the entertainment of thousands, made it commonplace to have orgies involving young boys, and also became so affluent that they were perfectly okay with pigging out on food and then puking off the back veranda only so they could come back and do it again. German tribes IN Germany went and sacked Rome, took control of it, and transformed it over the next few hundred years into the most powerful force in mainland Europe before the Nazi party corrupted it, brought World contempt down on it ultimately causing most of the other developed nations of the world to join forces to defeat them.