There are two schools of thought with different viewpoints regarding scope and subject matter of sociology- formal school and synthetic school. According to formal school sociology was conceived to be a social science with a specifically defined field. This school had George Simmel, Ferdinand Tonnies, Alfred Vierkandt and Leopord Von Wiese as its main advocates. On the other hand the synthetic school with Durkheim, Hobhouse and Sorokin advocated a synthesis in form of coordination among all social sciences.
Formal school has been criticized on the issue that it has emphasized on merely abstract forms and neglected the concrete contents of social life. Abstract forms separated from concrete relations cannot be studied. Ginsberg says that a study of social relationships would remain barren if it is conducted in the abstract without the full knowledge of the terms to which in concrete life they relate. Sociology doesn't alone study the forms of social relationship. Political science, International law also studies forms of social relationship. The conception of pure sociology is not practical as no social science can be studied in isolation from other social sciences.
Synthetic school wanted sociology to be synthesis of the social sciences and thus wanted to widen the scope of sociology. According to Durkheim, sociology has three principal divisions' namely-Social morphology, social physiology and general sociology. Social morphology is concerned with geographical or territorial basis of life of people such as population, its size, density and distribution etc.This can be done at two levels -analysis of size and quality of population which affects the quality of social relationship and social groups. Secondly the study of social structure or description of the main forms of social groups and institutions with their classification. Social physiology deals with the genesis and nature of various social institutions namely religion, morals, law and economic institutions etc.In general sociology the main aim is to formulate general social laws. Attempt is made to find out if there are links among various institutions which would be treated independently in social physiology and in the course to discover general social laws.Hobhouse perceived sociology as a science which has the whole social life of man as its sphere. Its relations with the other social sciences are considered to be one of mutual exchange and mutual stimulation. Karl Mannheim's divides sociology into two main sections-systematic and general sociology and historical sociology. Systematic sociology describes one by one the main factors of living together as far as they may be found in every kind of society. The historical sociology deals with the historical variety and actuality of the general forms of society. It falls into two sections-comparative sociology and social dynamics. Comparative sociology deals mainly with the historical variations of the same phenomenon and tries to find by comparison general features as separated from industrial features. Social dynamics deals with the interrelations between the various social factors and institutions in a certain given society for example in a primitive society. Ginsberg has summed up the chief functions of sociology as it seeks to provide a classification of types and forms of social relationships especially of those which have come to be defined institutions and associations. It tries to determine the relation between different parts of factors of social life for example the economic and political, the moral and the legal, the intellectual and the social elements. It endeavors to disentangle the fundamental conditions of social change and persistence and to discover sociological principles governing social life.
Thus on the basis of viewpoints of different sociologists we can get a general outline of the scope of sociology. Firstly the analysis of various institutions, associations and social groups which are results of social relationships of individuals should be the concern of sociology. Secondly the links among different parts of society should be studied. This objective is dealt with justice by functionalist school of sociology and Marxist school also gives importance to this viewpoint. Thus social structure should be given adequate importance in subject matter of sociology. Thirdly sociology addresses itself to the factors which contribute to social stability and social change. Fourthly sociology should also explain the trend of the changing pattern and the aftermath of the changes in the society.