Charles A. Ellwood, Sociology and Modern Social Problems
“ CHAPTER X THE NEGRO PROBLEM Already we have been brought in our study of the immigration problem to race problems—problems of the relations of races to one another and of their mutual adjustment. The negro problem is one of many race problems which the United States has, but because it is the most pressing of all of our race problems it is frequently spoken of as the race problem. An unsolved factor in all race problems is the biological influence of racial heredity, and this factor we must seek to understand and estimate at the very outset of any scientific study of the negro problem. ”
