The Arab conquest of North Africa transformed the cultural geography of the Mediterranean. The basin, previously described as a single broad cultural area, became divided between European or Christian communities and Arabo-Berber or Muslim societies. Each zone developed along increasingly separate cultural and political paths, even though commercial and military contacts continued across the sea.

From the perspective of western Europe, Africa became identified largely with the Muslim world. Incursions, invasions, influences, and ideas reached Europe from the southern Mediterranean, while direct European contact with Africa beyond the Muslim sphere remained limited. This restricted horizon encouraged Europeans to treat African inhabitants through the lens of hostility toward Islam, regardless of their colour.

The passage connects this lack of knowledge and presumed identification of black Africans with Muslims to the emergence of negative European representations of black people as embodiments of sin, evil, and inferiority. These attitudes appeared in the early medieval period and were later reinforced by the slave trade and slavery. The period thus shaped both Mediterranean cultural separation and enduring racialized prejudices.