New York: Thomas Y. Crowell Company, 1970. Hardcover. xx, 411p., third edition, worn dj. Reissue of the 1927 work, first revised in 1938. Sociologist Reuter conceives his study as the "Negro problem" - the problem the presence of Blacks poses to American society. Masuoka was student and friend of Reuter from the early 30s.