Population Redistribution and Language Spread in the Medieval Muslim World

Between the seventh and eighth centuries, a remarkable linguistic phenomenon took place: the Arabic language, which had been mainly the tongue of a few isolated tribes in Western Arabia, became the spoken and written language of a vast region that spanned from the Oxus River in the east to the Atlantic Ocean in the west. Virtually overnight, speakers of other languages had to become conversant and literate in Arabic in order to maintain their positions throughout the Arabic-speaking Muslim Empire. This article explores one factor that enabled the spread of Arabic in such an unprecedented manner: the mass population movement of Arabic speakers and others that occurred as a result of the expansion of the Muslim Empire. The article traces and analyses three categories of movement: initial settlement by the conquest armies; later voluntary movement due to scholarship, alliance building and intermarriage; and ruler-instigated population movement.