The rapid expansion of the early Islamic world is conventionally ascribed to a combination of brilliant military leadership and religious fervor. In this book, Abd al-Aziz Duri demonstrates how the growth, development and durability of early Islamic governance derived from highly sophisticated systems of administration (in which the idea of a Muslim ummah was the central feature) as well as efficient mechanisms for taxation and tax collection. The fact that in a highly dynamic period of Islamic history a seamless system of administration could endure for several centuries, from the early...