The advent of Islam in Arabia created a new regional actor: the Rashidun Caliphate. Later caliphates inherited the vast territories of expansion accrued under the Rashidun. The ordeal of civil war was the crucible from which the Umayyad Caliphate arose. Civil crisis had a lasting influence on both the strategic setting and then environment within which successive Umayyad and Abbasid caliphs had to contend. Unity and unification of the caliphate was a necessary political objective for the duration of all caliphates. The Umayyads fused their right to political legitimacy with their military prowess and notions of divine providence. The ideological dependency of the Umayyad Caliphate to an aggressive policy of security-maximising expansionism was predicated upon a politically legitimating doctrine of perpetual war which constantly directed strategic decision making. The dependency upon war serving as the only strategic instrument subordinated to the political ends of security, the Umayyad leadership was distracted from managing growing internal dissent and covert factions brewing rebellion and eventual revolution. The Abbasid Revolution of AD 750 not only ended the Umayyad House, but effectively sheathed the doctrine of perpetual war that the Umayyad Caliphate had wielded for nearly a century. The Abbasids squandered the vast territorial and strategic inheritance within decades of wrestling power. The early course of the Rashidun, Umayyad and Abbasid caliphates, was consistently one of political and territorial expansion followed by structural fragmentation, civil strife and subsequent collapse.

The Church’s victory in the “Investiture Controversy,” throwing off the domination achieved over it by secular powers following the death of Charlemagne, made it the first domain to successfully assert the right to manage its activities in accord with its own principles. But victory was only partial, leaving spiritual and secular powers facing each other across a field of constantly shifting relationships, giving heterodoxy more room to survive than elsewhere. An early example was the contrast between European universities, established as associations of teachers and students formed to assert autonomy from town authorities, and Islamic madrasas subject to direction by their elite patrons. When the corpus of Aristotelian texts became available, first in Arabic and later in Latin, it was first greeted with enthusiasm by readers of both, followed by suspicion because Greek materialism posed threats to religious doctrines. In Muslim lands, this led to a widespread rejection of philosophical inquiry as a path to truth; in Europe, attempts to impose similar restrictions failed, because university faculties resisted the claims of churchly conservatives to limit what could be taught. In this situation, scholastic speculation generated radical ideas about cosmology and physics, foreshadowing the break with traditional cosmology two centuries later.

A large number of Arabic decrees (ar. sijill, manšūr or marsūm) from the Fatimid, Ayyubid and Mamluk periods have been preserved in Christian, Jewish and Muslim caches. Besides original pieces, dozens of documents that are now lost have survived through copies made in chancery manuals. Although S. M. Stern and more recently Marina Rustow have sought to find continuities between the Fatimid decrees and their Abbasid forerunners, so far there is very little concrete evidence and, above all, no identified decree for the Abbasid period. In this article, Naïm Vanthieghem argues, as both suspected, that this genre indeed had forerunners in the Abbasid period, of which five have survived. Besides a study of their formulary, structure and script, the article tries to reconstruct how they worked and were used and how far this genre spread out through the Empire.

This chapter examines the medieval Greek and Arabic sources for the movement of medical substances between the Byzantine and Islamic worlds in the period from the ninth to the twelfth centuries. Although commerce was the most common means employed in the movement of materia medica, and the part played by tribute taking and looting was not negligible, the role of diplomatic gift exchange cannot be ignored. A relatively wide range of drugs were exchanged, ranging from theriac and a stone against dropsy to spices and perfumes. Moreover, this chapter examines the peculiar role of drugs as gifts in diplomatic communication compared to more typical diplomatic gifts such as expensive textiles and luxurious objects. Not suited to acting as objects of display, materia medica seemed to convey a personal message of care, creating mutual ties between the sender and the recipient.

Much evidence – textual, material and documentary – points to slavery in the early and medieval Islamic Middle East (c. 600-1000 CE) as a social fact, persistent and multivalent. This is especially true for the urban landscape: the presence of enslaved and freed persons would have been impossible to miss. More difficult is the reconstruction of Middle Eastern agrarian slavery. This is a survey essay with particular reference to the early Abbasid Caliphate (c. 750-950) and select questions around which debate in modern scholarship has grown. One must comb medieval Arabic texts (literary and documentary) to reconstruct patterns of early Islamic-era enslavement; the organization and dynamics of slave commerce; the demands on slave and freed labor; and the (relative) social integration of the enslaved. The Arabic/Islamic library illuminates all manner of topics, religious and secular alike. Literary references to slavery and/or enslaved persons therein are plentiful and of a great variety. One has references in works of poetry and adab, an elastic term used for a variety of Arabic prose writings. Equally numerous are references in chronicles, biographical dictionaries, and works of geography and political thought. Medieval Arabic legal and religious writings provide a considerable number of references as well.

This chapter investigates the emergence of imperial space in the early Islamic world, 7th–12th centuries, and Muslim notions of empire in this period. It examines how an imperial space was conquered under the Prophet Muhammad, Rashidun Caliphs and Umayyad dynasty, reaching its height in c.740, followed by its fragmentation under the Abbasid Caliphate (750–1258). The role of jihad in this expansion is examined, along with the institutions that bound the empire together and the reasons for its disintegration. The expansion of the frontiers of the Islamic world only began again under Turkish dynasties, the Seljuqs, Qarakhanids and Ghaznavids in the 11th century, when parts of Anatolia, Central Asia and India were conquered. Finally, this chapter considers how imperial space was visualised and represented in this period, examining the evidence of maps in manuscripts of works by Arabic geographers of the 10th–11th centuries.