The history of Ghana attracts popular interest out of proportion to its small size and marginal importance to the global economy. Ghana is the land of Kwame Nkrumah and the Pan-Africanist movement of the 1960s; it has been a temporary home to famous African Americans like W. E. B. DuBois and Maya Angelou; and its Asante Kingdom and signature kente cloth-global symbols of African culture and pride-are well known. Ghana also attracts a continuous flow of international tourists because of two historical sites that are among the most notorious monuments of the transatlantic slave trade: Cape...