There were 'civilisations' in East and West Africa (Zimbabwe) and they were very localised, and entirely agrarian. Since then, civilisation has largely been absent from that continent after the colonials were ousted. Africa, for some unaccountable reason, goes backwards, it regresses, gets poorer and more disease ridden, and is beset by violent, megalomaniacal dictators. The rest of the world (apart from some countries in South America) progresses, Africa regresses. Not one country south of the Sahara has improved since the colonial days.