"On the whole, the process by which captives were obtained on African soil was not trade at all. It was through warfare, trickery, banditry, and kidnapping. When one tries to measure the effect of European slave trading on the African continent, it is essential to realize that one is measuring the effect of social violence rather than trade in any normal sense of the word. Many things remain uncertain about the slave trade and its consequences for Africa, but the general picture of destructiveness is clear, and that destructiveness can be shown to be the logical consequence of the manner of recruitment of captives in Africa."