For centuries the end of the Roman Empire in the West was seen as a major turning point in history, the fall of the sophisticated and educated classical world to uncouth and illiterate tribes. Over the last several decades, however, many historians have put a greater emphasis on continuities. Barbarian kings relied on officials trained in Roman law, and Latin remained the language of scholarly communication and the Christian Church. Greco-Roman art and architecture still adorned the land, and people continued to use Roman roads, aqueducts, and buildings. In eastern Europe and western Asia, the Byzantine Empire preserved the traditions of the Roman Empire and protected the intellectual heritage of Greco-Roman culture for another millennium.

In the middle of the era covered in this chapter, a new force emerged that had a dramatic impact on much of Europe and western Asia — Islam. In the seventh and eighth centuries Sassanid Persia, much of the Byzantine Empire, and the barbarian kingdoms in the Iberian Peninsula fell to Arab forces carrying this new religion. As we have seen in this chapter, a reputation as victors over Islam helped the Franks establish the most powerful state in Europe. As we will see when we pick up the story of Europe again in Chapter 14, Islam continued to shape European culture and politics in subsequent centuries. In terms of world history, the expansion of Islam may have been an even more dramatic turning point than the fall of the Roman Empire. Here, too, however, there were continuities, as the Muslims adopted and adapted Greek, Byzantine, and Persian political and cultural institutions.