The necessity for close cooperation between psychiatrist and sociologist is evident when it is considered that mental disorder and social disorder are but two aspects of the same condition.

1 Kellogg, Theodore H., M.D. A Text-Book of Mental Diseases. New York, 1897, pp. 501 and 515.

The interrelation of mental and social conditions appears with particular distinctness in two recently conducted county-surveys of mental disorders.1 The object of the Survey in Nassau County, New York, is stated as follows:

"The principal question raised is not, What is the percentage of ' insane ' or ' feeble-minded ' or ' mentally defective ' persons in the population? But rather, What instances of social maladjustment sufficiently marked to have become the concern of public authorities, are, upon investigation, to be attributed mainly or in large measure to mental disorders? Thus the main object of the Survey was to study the nature of the relationship between social maladjustments and mental disorders."

Out of 1592 abnormal cases found in the county, only 163 or 10.2% showed no social maladjustment, all the others having shown social maladjustment of one or more of the following specified types: (a) Retardation in school, (6) Truancy, unruliness, (c) Sex immorality, (d) Criminal tendency, (e) Vagrancy, (/) Dependency, (g) Inebriety, (h) Drug habits, (i) Domestic maladjustment, (j) Medical cases.

In this connection, the position taken by the President of The National Committee for Mental Hygiene,2 may be quoted as a criterion: "If sociology is the science that deals with social forces, social structures and institutions, social functions, and social progress (genetic and telic), the mere statement of the fact is surely sufficient evidence of the importance of this science to the student and practitioner of mental hygiene."

1 Aaron J. Rosanoff, M.D. Report of a Survey of Mental Disorders in Nassau County, New York. National Committee for Mental Hygiene, 1916. - Herman M. Adler, M.D. Cook County and the Mentally Handicapped: A Study of the Provisions for Dealing with Mental Problems in Cook County, Illinois. Report of Survey, 1916-1917. National Committee for Mental Hygiene, 1918.

2 Lewellys F. Barker. The First Ten Years of the National Committee for Mental Hygiene, with Some Comments on its Future. Mental Hygiene. Oct., 1918.