Does anyone know anything about the history of Islam?

cythereia2000 asked: I need to know:
Why were the Fath wars so quickly and widely successful?
How did the Abbasid Revolution of the mid-8th century change the political, economic, and cultural character of the Cliphate?
and
What was mu’tazila, and why did it lose its predominance by the 12th-13th centuries? What might be some of the longer-term cultural consequences [...]