How did the barbarian tribes change social order to create a period that became known as the dark ages?

Hell Went Loose And Order Was Gone

Explanation:

Using background info about the Dark Ages things went to hell right away so many tyrannical rulers which lead to the thirst for power. Plus the barbarian tribes changed by them joining the monarchy.

I doubt what I said would be in your textbook you would be reading.

either b) they were often feared and despised by other native cultures. or

c) their obsession allowed them to coexist with many other native cultures because of their peaceful nature.