"Development and underdevelopment are not only comparative terms, but that they also have a dialectical relationship one to the other: that is to say, the two help produce each other by interaction. Western Europe and Africa had a relationship which insured the transfer of wealth from Africa to Europe. The transfer was possible only after trade became truly international; and that takes one back to the late fifteenth century when Africa and Europe were drawn into common relations for the first time—along with Asia and the Americas. The developed and underdeveloped parts of the present capitalist section of the world have been in continuous contact for four and a half centuries. The contention here is that over that period Africa helped to develop Western Europe in the same proportion as Western Europe helped to underdevelop Africa."