The Dyula (Dioula or Juula) are a Mande ethnic group inhabiting several West African countries, including Mali, Cote d'Ivoire, Ghana, and Burkina Faso. Characterized as a highly successful merchant caste, Dyula migrants began establishing trading communities across the region in the fourteenth century. Since business was often conducted under non-Muslim rulers, the Dyula developed a set of theological principles for Muslim minorities in non-Muslim societies. Their unique contribution of long-distance commerce, Islamic scholarship and religious tolerance were significant factors in the peaceful expansion of Islam in West Africa. Historical background The Mandé embraced Islam during the thirteenth century following introduction to the faith through contact with the North African traders. By the 14th century, the Malian empire (c.1230-1600) had reached its apogee, acquiring a considerable reputation for the Islamic rulings of its court and the pilgrimages of several emperors who followed the tradition of Lahilatul Kalabi, the first black prince to make hajj to Mecca. It was at this time that Mali began encouraging some of its local merchants to establish colonies close to the gold fields of West Africa. This migrant trading class were known as Dyula, the Mandingo word for “merchant”. The Dyula spread throughout the former area of Mandé culture from the Atlantic coast of Senegambia to the Niger and from the southern edge of the Sahara to forest zones further south. They established decentralized townships in non-Muslim colonies that were linked to an extensive commercial network, in what was described by professor Philip D. Curtin as a “trading diaspora.” Motivated by business imperatives, they expanded into new markets, founding settlements under the auspices of various local rulers who often permitted them self-governance and autonomy. Organization of dyula trading companies was based on a clan-family structure known as the lu - a working unit consisting of a father and his sons and other attached males. Members of a given lu dispersed from the savanna to the forest, managed circulation of goods and information, placed orders, and effectively controlled the economic mechanisms of supply and demand. Suwarian tradition Over time dyula colonies developed a theological rationale for their relations with non-Muslim ruling classes and subjects in what author Nehemia Levtzion dubbed “accommodationist Islam”. The man credited with formulating this rationale is Sheikh Al-Hajj Salim Suwari, a Soninke cleric from the core Mali area who lived around 1500. He made hajj to Mecca several times and devoted his intellectual