None of this is true... politics mainly happened at the local level because the imperial Roman empire was destroyed, but that only changed development and innovation. Have you ever read Beowulf? It is one of the most highly developed pieces of Old English poetry, at 3000 lines, and was written in this time period. Silver mining increased, and many technological innovations like iron plows emerged. Beautiful cathedrals were constructed in the Romanesque style, and learning continued in monastical schools all over Europe.

There was international trade and military activity ranging from Scandinavian societies raiding into Europe and the Mediterranean, as well as the Crusades starting up near the end of this period. The Christian church of the Roman empire, otherwise known as the Roman Catholic Church, was alive and well, becoming one of the most powerful institutions for the next several hundred centuries. "Dark Ages" is an antiquated term - think transition, not Camelot (although the legend did originate in this period). It is often called the "Early Middle Ages" these days.