This infusion of white blood into a portion of the negro population is significant sociologically. It is the negroes of mixed blood who are ambitious socially and who present some of the most acute phases of the negro problem. It is from the mixed bloods that the leaders of the race in this country have come. The pure negro without intermixture has hitherto seemed incapable of leadership. Such men as Booker T. Washington, Professor Du Bois, and most other negro leaders have a considerable mixture of white blood. A list of 2200 negro authors was once compiled by the Librarian of Congress, and investigation showed that with very few exceptions these negro authors came from the mixed stock. Indeed, practically all of the negroes who have been eminent in literature, science, art, or statesmanship have come from this class of mixed bloods. But the infusion of white blood has also in some ways been a detriment to the negro. The illegitimate offspring resulting from the unions of white fathers and negro mothers are frequently the product of conditions of vice. The consequence is that the child of mixed origin frequently has a degenerate heredity and, coming into the world as a bastard, is more or less in disfavor with both races; hence the social environment of the mulatto as well as his heredity is oftentimes peculiarly unfavorable. It is not surprising, therefore, to find among the mulattoes a great amount of constitutional diseases and a great tendency to crime and immorality. Again mulatto women are more frequently debauched by white men than the pure blood negro women, and for this reason negro women of mixed blood are more apt to be immoral. So we see that while the mixed bloods have furnished the leaders of their race, they have also furnished an undue proportion of its vice and crime. This is exactly what we should expect when we understand the social conditions existing between the races and the origin and social environment of the mulatto.