サハラ交易
He has also spoken out for the need to revive the Trans-Saharan trade stating that "The Sahel was a major part of global commerce; it was the transit point of trade from Asia to the Atlantic and to Europe. The cities of the Sahel – Timbuktu, Gao, Kano, Agadez – were the richest cities in Africa before the steamship, before colonialism. Many of the countries in the Sahel are part of a great Arab Islamic civilisation – the official language of communication was Arabic."