Today, the Italians have (hard) wheat foods like spaghetti and macaroni as their staple, while most Europeans use the potato. The Italians took the idea of the spaghetti-type foods from the Chinese noodle after Marco Polo returned from travels there, while Europe adopted the potato from American Indians. In neither case were Europeans enslaved before they could receive a benefit that was the logical heritage of all mankind, but Africans are to be told that the European slave trade developed us by bringing us maize and cassava.

p. 156. - How Europe Underdeveloped Africa (1972)