career to developing an understanding of the faith that would assist Muslim minorities in “pagan” lands. He drew on North African and Middle Eastern jurists and theologians who had reflected on the problem of Muslims living among non-Muslim majorities, situations that were frequent in the centuries of Islamic expansion. Sheikh Suwari formulated the obligations of Muslim minorities in West Africa into something known as the Suwarian tradition. It stressed the need for Muslims to coexist peaceably with unbelievers and so justified a separation of religion and politics. In this understanding, Muslims must nurture their own learning and piety and thereby furnish good examples to the non-Muslims around them. They could accept jurisdiction of non-Muslim authorities as long as they had the necessary protection and conditions to practice the faith. In this teaching, Suwari followed a strong predilection in Islamic thought for any government, even if non-Muslim or tyrannical, as opposed to none. The military jihad was a resort only if the faithful were threatened. Suwari discouraged dawah (missionary activity), instead contending that Allah would bring non-Muslims to Islam in His own way; it was not a Muslim's responsibility to decide when ignorance should give way to belief. Since their Islamic practice was capable of accommodating traditional cults, dyula often served as priests, soothsayers, and counselors at the courts of animist rulers. Commercial and political expansion As fellow Muslims, dyula merchants were also able to assess the valuable trans-Saharan trade network conducted by North African Arabs and Berbers whom they met at commercial centers across the Sahel. Some important trade goods included gold, millet, slaves, and kola nuts from the south and slave beads and cowrie shells from the north (for use as currency). It was under Mali that the great cities of the Niger bend including Gao and Djenné prospered, with Timbuktu in particular becoming known across Europe for its great wealth. Important trading centers in Southern West Africa developed at the transitional zone between the forest and the savanna; examples include Begho and Bono Manso (in present-day Ghana) and Bondoukou (in present-day Côte d'Ivoire). Western trade routes continued to be important, with Ouadane, Oualata and Chinguetti being the major trade centres in what is now Mauritania. Penetration into southern forest regions The development of Dyula trade in Ghana and the adjacent Ivory Coast had important political consequences and sometimes military implications as well. The dyula spearheaded Mande penetration of