Answer:
1. Invasions by Barbarian tribes.
2. Economic troubles and overreliance on slave labor.
3. The rise of the Eastern Empire.
4. Overexpansion and military overspending.
5. Government corruption and political instability.
6. The arrival of the Huns and the migration of the Barbarian tribes.
Explanation:
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Answer:
fear the economies would collapse
Explanation:
These are concurrent powers
The expanding of the muslim Empire in the years following the Prophet Muhammad's death led to the creation of the caliphates, occupying a vast geographical area and conversion to Islam was boosted by missionary activities particularly those of Imams, who easily intermingled with local populace to propagate the religious teachings.