By what magic was all that brought about? By an infinite variety and complexity of specialized Labor, which, applied to a variety of special kinds of Land (Natural Resources)--in country, town and city,--produced all the Wealth (Artificial Objects) necessary for the production of more Wealth, namely the Capital; and this consisted of implements and structures made from and upon Land by Labor; of implements and structures for the production of those implements and structures, also made from and upon Land by Labor; of transportation facilities of many kinds similarly made and operated. Also buildings for stores as well as factories--all in a confusion of industrial specialties that can be unraveled only by generalizing the details in accordance with natural law as disclosed by the Basic Facts. Let that unraveling be done and still we may be bothered by collateral problems to which those details give rise--banking, for instance, and book-keeping all along the productive lines. To follow in detail the ramifications of the Production of that needle from the first effort of Labor to which it owes its existence, to its delivery at the retail store in a “paper of needles” to the house-wife in whose deft hands we find it, would drive even a magician mad. But all confusion is banished if we classify the multitudinous details according to their natural characteristics respectively, as Labor, Land and Wealth. And as of the details of that needle’s production, so of all Economic details, from least to greatest, from simplest to most complex, throughout the labyrinthine intricacies of the Productive Process in Economics. To study separately all the Economic constituents of even the simplest civilized habitation and their respective relations to it, Economically, one would need training in many different kinds of specialties, from forestry to decoration. Yet systematic Economic thinking assigns every Economic detail to three categories which can be studied without risk of confusion. It need hardly be again explained that those three categories are Labor, Land and Wealth. Every constituent of such a habitation, no matter how minute, is assignable for primary Economic study to one or another of those Basic Facts--to Land for the site, and for all the rest, from architectural designing to decorative completion, to composites of Land and Labor.