In spite of his grasp of details Mr. Washington never became so immersed in them as to lose sight of his ultimate goal, and conversely he never became so blinded by the vision of his ultimate goal as to overlook details. The solution of the so-called Negro problem in America, he felt, is to be found along these lines: As his people have more and more opportunity for training and become better and better trained they become more and more self-sufficient. They are developing their own carpenters, masons, blacksmiths, farmers, merchants, and bankers as well as lawyers, teachers, preachers, and physicians. These trained people naturally, for the most part, serve their own race, and to them the members of the race naturally turn for the service that each is equipped to render. As they acquire wealth, education, and cultivation, the persons possessing these advantages naturally intermingle socially and build up a society from which the rough, ignorant, and uncouth of their own race are as inevitably excluded as are such persons from all polite social intercourse of whatever people. These Negroes of education and cultivation no more desire to force themselves into the society of the other race than do any persons of real education and cultivation desire to go where they are not wanted. As the race increases in wealth and culture it becomes more and more easy and natural for its successful members to satisfy their social desires and ambitions in their own society. Already in the centres of Negro prosperity and culture it would be almost, if not quite, as impossible for a white man to be received into the best Negro society as it would for a Negro to be received into the best white society. This growing independence and self-sufficiency in the trades, the professions, and social intercourse leads inevitably, as he pointed out, to a form of natural segregation based upon economic needs and social preferences, and in conformity to the laws of nature, which is a very different matter from the artificial and arbitrary segregation forced upon unwilling people by the laws of men. Under these conditions the disputes as to whether the best society of the blacks is inferior or superior to the best society of the whites becomes as academic and futile as would be similar contentions as to whether the best society of Constantinople is inferior or superior to that of Boston. While Negroes are more and more drawing apart from the whites into their own section of the city, town, or county they nevertheless find it a source of strength to live near the whites in order that they may have the benefit of their aid in those matters in which the older and stronger race excels. Nor is this an entirely one-sided advantage, as there are not a few matters in which the Negroes have natural advantages over the whites and hence may render them useful service. Thus the two races, socially separated but economically interdependent, may to mutual advantage live side by side.