Muslim traders from the Maghrib frequented the Sahelian trading centres from the eighth century. Because these centres also served as capitals of early kingdoms, commercial contact brought Muslim influence into the political sphere. Gao’s relations with the Ibāḍite state of Tahert illustrate how trade and diplomacy could connect Sudanic rulers with Muslim polities beyond the Sahara.

The pages emphasize that Islamization did not follow a single pattern. In Gao, the king and royal symbols were Muslim by the eleventh century, but common people continued to worship idols and court practices retained pre-Islamic features. In Takrūr, by contrast, War-Dyābe ibn Rābīs is credited with adopting Islam, introducing Islamic law, and compelling its observance.

The spread of Islam was also connected to economic networks. The kola trade is described as crucial to Islam’s movement between the Sahel and the fringes of the forest, especially during the centuries after the seventeenth-century decline of the gold trade. Religious change thus operated through merchants, rulers, law, royal ceremony, and commodity exchange rather than through a uniform transformation.