The interest stimulated by ethnological observation, historical study, and propagandist essays has, however, turned the attention of certain students to serious study of the family and its problems. Howard's History of Matrimonial Institutions is a scholarly and comprehensive treatise upon the evolution of the legal status of the family. Annual statistics of marriage and divorce are now compiled and published by all the important countries except the United States government. In the United States, however, three studies of marriages and divorces have been made; one in 1887-88, by the Department of Labor, covering the twenty years from 1867-86 inclusive; another in 1906-7, by the Bureau of the Census, for the twenty years 1887-1906; and the last, also by the Bureau of the Census, for the year 1916.

The changes in family life resulting from the transition from home industry to the factory system have created new social problems. Problems of woman and child labor, unemployment, and poverty are a product of the machine industry. Attempts to relieve the distress under conditions of city life resulted in the formation of charity organization societies and other philanthropic institutions, and in attempts to control the behavior of the individuals and families assisted. The increasing body of experience gained by social agencies has gradually been incorporated in the technique of the workers. Mary Richmond in Social Diagnosis has analyzed and standardized the procedure of the social case worker.

Less direct but more fundamental studies of family life have been made by other investigators. Le Play, a French social economist, who lived with the families which he observed, introduced the method of the monographic study of the economic organization of family life. Ernst Engel, from his study of the expenditure of Saxon working-class families, formulated so-called "laws" of the relation between family income and family outlay. Recent studies of family incomes and budgets by Chapin, Ogburn, and others have thrown additional light upon the relationship between wages and the standard of living. Interest in the economics of the family is manifested by an increasing number of studies in dietetics, household administration and domestic science.

Westermarck in his History of Human Marriage attempted to write a sociology of the family. Particularly interesting is his attempt to compare the animal family with that of man. The effect of this was to emphasize instinctive and biological aspects of the family rather than its institutional character. The basis for a psychology of family life was first laid in the Studies in the Psychology of Sex by Havelock Ellis. The case studies of individuals by psychoanalysts often lead into family complexes and illuminate the structure of family attitudes and wishes.

The sociological study of the family as a natural and a cultural group is only now in its beginnings. An excellent theoretical study of the family as a unity of interacting members is presented in Bosanquet, The Family. The family as defined in the mores has been described and interpreted, as for example, by Thomas in his analysis of the organization of the large peasant family group in the first two volumes of the Polish Peasant. Materials upon the family in the United States have been brought together by Calhoun in his Social History of the American Family.

While the family is listed by Cooley among primary groups, the notion is gaining ground that it is primary in a unique sense which sets it apart from all other social groups. The biological interdependence and co-operation of the members of the family, intimacies of closest and most enduring contacts have no parallel among other human groups. The interplay of the attractions, tensions, and accommodations of personalities in the intimate bonds of family life have up to the present found no concrete description or adequate analysis in sociological inquiry.

The best case studies of family life at present are in fiction, not in the case records of social agencies, nor yet in sociological literature. Arnold Bennett's trilogy, Clayhanger, Hilda Lessways, and These Twain, suggests a pattern not unworthy of consideration by social workers and sociologists. The Pastor's Wife, by the author of Elizabeth and Her German Garden, is a delightful contrast of English and German mores in their effect upon the intimate relations of family life.

In the absence of case studies of the family as a natural and cultural group the following tentative outline for sociological study is offered:

1. Location and extent in time and space.—Genealogical tree as retained in the family memory; geographical distribution and movement of members of small family group and of large family group; stability or mobility of family; its rural or urban location.

2. Family traditions and ceremonials.—Family romance; family skeleton; family ritual, as demonstration of affection, family events, etc.