earned the reputation of aiming to reduce economics to a descriptive knowledge of details and to confine its method to the Baconian ground of generalisation by simple enumeration. But this exhaustive historical scrutiny and description of detail has always, in Professor Schmoller's view, been preliminary to an eventual theory of economic life. The survey of details and the empirical generalisations reached by its help are useful for the scientific purpose only as they serve the end of an eventual formulation of the laws of causation that work out in the process of economic life. The ulterior question, to which all else is subsidiary, is a question of the causes at work rather than a question of the historical uniformities observable in the sequence of phenomena. The scrutiny of historical details serves this end by defining the scope and character of the several factors causally at work in the growth of culture, and, what is of more immediate consequence, as they are at work in the shaping of the economic activities and the economic aims of men engaged in this unfolding cultural process as it lies before the investigator in the existing situation. In the preliminary work, then, of defining and characterising the causes or factors of economic life, historical investigation plays a large, if not the largest, part; but it is by no means the sole line of inquiry to which recourse is had for this purpose. Nor, it may be added, is this the sole use of historical inquiry. To the like end a comparative study of the climatic, geographical, and geological features of the community's environment is drawn into the inquiry; and more particularly there is a careful study of ethnographic parallels and a scrutiny of the psychological foundations of culture and the psychological factors involved in cultural change.