Chapter Summary
By the mid 9th century the Abbasids were losing control
over their vast Muslim empire.
Distance hampered efforts to move armies and control
local administrators.
Most subjects also retained local loyalties.
Shi'i dissenters were particularly troublesome, while slave
and peasant risings weakened the empire.
Mongol invasions in the 13th century ended the very
weakened state.
Despite the political decline, Islamic civilization reached
new cultural heights, and Islam expanded widely in the
Afro-Asian world through conquest and peaceful
conversion.