Slaves, besides being common laborers, were often men of considerable skill and learning, Slavery was not a badge of human inferiority. Thus, the first slaves procured by the Europeans from Africa were displayed as curiosities and as proof of affluence. While, especially at the beginning, some slaves were taken by force, most of the African slaves acquired by the Europeans were obtained in the course of a peaceful and regular bargaining process.
When the Portuguese arrived in West Africa, they found a thriving economy which had already developed its own bustling trading centers. Before long, a vigorous trade opened up between the Portuguese and the West Africans. Slaves were only one of a great variety of exports, and guns were only one of a large variety of imports. One of the ways in which the slave trade came to cripple the West African economy was that slaves became almost the exclusive African export. The more the Africans sought to fulfill the Europeans' thirst for slaves, the more they needed guns with which to procure slaves, and to protect themselves from being captured and sold into slavery. Therefore, the Euro-African trade, instead of further stimulating the African economy, actually limited production of many items and drained it of much of its most productive manpower.
The rulers, who had voluntarily and unwittingly involved themselves in this gigantic trade, soon found themselves trapped. Those who wanted to eliminate or reduce the trade in slaves and who preferred to develop other aspects of a trading economy, found themselves helpless. A ruler who would not provide the Europeans with the slaves they desired was then bypassed by all the European traders. Besides losing the revenue from this trade, his own military position was weakened. Any ruler who did not trade slaves for guns could not have guns. Without guns, he would have difficulty in protecting himself and his people. Any ruler or people who could not provide adequate self-defense could be captured and sold into slavery. Once begun, the Africans found themselves enmeshed in a vicious system from which there seemed to be no escape. The only possibility for escape would have been the development of some kind of African coalition, but each petty ruler as too concerned with his own power to be able to contemplate federated activity. European greed fed African greed, and vice a versa.
In the beginning, African slaves were carried back to Portugal and other parts of Europe to be used as exotic domestic servants. In some cases, they were also used as farm laborers. Parts of Portugal were suffering from a distinct shortage of farm laborers, and Africans filled the void. At the beginning of the sixteenth century, in some sections of rural Portugal as much as one third of local population was African in origin.
Even so, European labor needs could not support much of a slave trade for long. The enclosure system was under way, changing farming techniques, and it had created a labor surplus. However, at the same time, emerging capitalism financed explorations in Africa, Asia, and the western hemisphere. African sailors were involved in most of these explorations including Columbus's voyage in 1492. New World gold provided the economic basis for even more rapid European expansion. When the New World came to be viewed by the hungry capitalists as having a potential for agricultural exploitation, New World labor needs expanded astronomically. At first these needs were filled by surplus labor from Europe or by exploiting the local Indian populations. When these labor sources proved to be inadequate, the exploitation of slave labor from Africa was the obvious answer.
While the Portuguese were the first to reach the shores of West Africa and the first to bring African slaves back to Europe, neither they nor the Spaniards ever dominated the slave trade which followed. In 1493, as European exploration of the world moved into high gear, the Pope published a Bull dividing the world yet to be explored into two parts. His intention was to limit competition and conflict between the rulers of Spain and Portugal and to prevent undue hostility between his two main supporters.
However, this left the other European powers, officially, with no room for overseas expansion. While these powers refused to acknowledge the legality of the Bull and soon became involved in exploration and colonization in spite of it, they also tended to become more involved than did Portugal or Spain in some of the by-products of colonization, such as the slave trade. When the Spaniards began to use slaves in their American colonies, the Dutch, French, and British were only too eager to provide the transportation. Before long, they too had colonies and slaves of their own.
The triangular trade between Europe, Africa, and the New World, was one of the most lucrative aspects of the mercantile economy. Mercantilism sought to keep each country economically self-sufficient. Within this framework the role of the colony was to provide the mother country with raw materials which it could not produce for itself and to be a market for the consumption of many of the manufactured goods produced within the mother country.
This triangular trade began in Europe with the purchase of guns, gunpowder, cheap cotton, and trinkets of all kinds. These were shipped to the coast of West Africa and unloaded at a trading station. At key points along the coast, the European nations had made treaties with the local rulers allowing them to set up trading stations and slave factories. At this point, the European traders entered into hard bargaining sessions with the representatives of the local ruler in which the manufactured goods from Europe, especially guns, were traded for African slaves. When the deal was completed, the slaves were loaded on the ship, and the captain set sail for the New World.
Upon arrival in the West Indies, another bargaining process was begun. Here the slaves were traded for local agricultural products which were wanted in Europe. Then the ships were loaded with tobacco, sugar, and other West Indian produce and returned to Europe for still another sale and another profit. At every point along the route, large sums of money were made. A profit of at east one hundred percent was expected. Vast wealth was obtained through the slave trade, and this money was reinvested in the developing industrial revolution. Thereby the Africans unwittingly helped to finance the European industrial revolution which widened the technological gap between Africa and Europe.