What was the role of the Caliphs?

The position of caliph became hereditary during the Umayyad Caliphate, making it the first Islamic dynasty. ... One of the responsibilities of the Caliph was to protect the Islamic holy cities of Mecca and Medina.

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disequilibrium means that either supply is greater than the demand for an available good, or that the demand for a product outstrips the available supply. it implies that the price for a is either too low creating large demand, or too high creating a large surplus of supply.

wwii

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