PRESIDENT Muhammadu Buhari’s attendance, late last month, at the ninth summit of the D-8 Organisation for Economic Cooperation, entrenched the Nigerian government’s disconcerting penchant for mixing governance with religion at all levels. Though couching its goals in economic aspirations, the D-8 remains an exclusive club of Islamic countries. Since Nigeria’s constitution expressly forbids the promotion of any faith, it is time Nigeria reconsidered its membership of this and other overtly religious bodies. The meeting was held in Istanbul, Turkey, with ministerial conferences scheduled for Nigeria this week. The summit’s theme, Expanding Opportunities through Cooperation, focused on mutual cooperation in agriculture, trade, transport, energy, and promotion of private sector activities in member countries. Buhari reminded member heads of government at the event of the need to establish “integrated manufacturing structures” and attracting investment. E...