In the process, then, of making a living, mankind trades commodities in terms of Money rather than in its forms, doing so principally through financial accounts. Peering into the details of those accounts (as professional accountants and other business specialists must often do when examining the particulars of their respective specialties), however useful this may be within the limits of the specialization, is always futile and often confusing or misleading for purposes of Economic study or investigation as a whole. In Economics the purpose is not to understand the technical details of business specialties simply. It is chiefly to relate those details to one another by determining their respective Economic categories so that the whole subject may be reasoned about comprehensively. Some business specialties may necessitate a knowledge in detail of the physical characteristics of sugar, for instance, or of cotton; but what an understanding of the science of Economics requires in such particulars is an intelligent grasp of the nature of sugar or cotton with reference to fundamental Economic categories--whether they are human, or natural, or artificial,--and to what extent, therefore, they are Economically related to all other commodities in the realm of trade. For into one or the other of those three categories, all the myriads of Economic details assemble themselves. For purposes of Economic specialization, this assignment of details to categories is not enough; but without it no specialization is dependable. Some such identification of particular facts with reference to their fundamental differences or identities, is absolutely necessary for accurate observation of Economic phenomena and clearness of Economic thought; and are not accurate observation and clarity of thought the prime requisites of Economic study? Not to make those identifications and differentiations is to turn Economics into the hopeless mixture of “masses of particular unexplained facts” which John Morley deplored as characteristic of a certain type of Economic science. “Scraps and pickings of reality” are worse than useless in any study of Economic science unless harmoniously classified according to their respective fundamental characteristics.