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92 In social, as in all other kinds of human activity, psychological factors must have an essential part. I have myself in these lectures pointed to psychological considerations as elements in the problems with which the sociologist has to deal. These psychological elements are, however, only concomitants of social processes with which it is possible to deal apart from their psychological aspect. It has been the task of these lectures to refer the social facts of relationship to antecedent social conditions, and I believe that this is the proper method of sociology. Even at the present time, however, it is possible to support sociological arguments by means of considerations provided by psychological motives, and the assistance thus rendered to sociology will become far greater as the science of social psychology advances.

This is, however, a process very different from the interpolation of psychological facts as links in the chain of causation connecting social antecedents with social consequences. It is in no spirit of hostility to social psychology, but in the hope that it may help us to understand its proper place in the study of social institutions that I venture to put forward the method followed in these lectures as one proper to the science of sociology.

It may be that there will be those who will accept my main position, but will urge that these lectures have been devoted to the criticism of an extreme