can wilderness and which not only hastened the economic development of America directly but indirectly released for other employment, thousands of white men and thus enabled America to grow economically and spiritually at a rate previously unparalleled anywhere in history. It was black labor that established the modern world commerce which began first as a commerce in the bodies of the slaves themselves and was the primary cause of the prosperity of the first great commercial cities of our day. Then black labor was thrown into the production of four great crops—tobacco, sugar, rice and cotton. These crops were not new but their production on a large cheap scale was new and had a special significance because they catered to the demands of the masses of men and thus made possible an interchange of goods such as the luxury trade of the Middle Ages catering to the rich could not build. Black labor, therefore, beneath these crops became an important part of the Industrial Revolution of the eighteenth and nineteenth centuries.
Moreover the black slave brought into common labor certain new spiritual values not yet fully realized. As a tropical product with a sensuous receptivity to the beauty of the world he was not as easily reduced to be the mechanical draft-horse which the northern European laborer
