A historical reference work on Morocco must take as its subject al-maghrib al-aqsa (the far west) as the Arabic scholars have generally referred to the approximate region of present-day Morocco, roughly the north-west corner of Africa but at times including much of the Iberian peninsula, because the modern nation-state is a relatively recent creation owing much to events in the late 19th and early 20th centuries. External influences on Morocco tend to come across the narrow straits of Gibraltar to the north, from the east along the Mediterranean litoral, or up from the Sahara. In each case,...