Browning struck a key-note when in his “Abt Vogler” he wrote of the “manifold music” evolved by bidding the organ obey, that-- ... “effect proceeds from cause, Ye know why the forms are fair, ye hear how the tale is told; It is all triumphant art, _but art in obedience to laws_.” If any Economic experiment “works” (as a pragmatist might say of it), why does it work? What other explanation can there be than that it “works” because it is a correct adaptation of cause to effect in obedience to mandates of natural Economic law. Consumption of food is a natural effect of the natural necessity for food--a natural law. Production of food is a natural effect of the natural need of food for consumption--a natural law. Resort to Natural Resources as the sole source and foundation from and upon which to produce food is a natural effect caused by the natural need for food--a natural law. Nor can natural law be limited to the individual man any more than it is to trees. Associated man also is governed by it. It is the latter relation that distinguishes it as Economic. From the natural desire of individual man for production from and upon Natural Resources, social Trade develops, not arbitrarily but as a natural consequence of a related natural cause. Let thoughtless students and professors of Economics who deny natural Economic law--the normal conditions of cause and effect that govern cooperative mankind in making a living--explain Economic phenomena, if they can, without reference to Economic cause and effect, or Economic cause and effect with natural Economic law left out. Natural Economic law might, perhaps, be given another and more accurately descriptive name. Yet its existence and its potency for good results or bad, according to obedience or indifference to it, are beyond all possibility of denial by any Economic student who knows what it means and who, thinking with clarity, speaks with a sense of responsibility. Its name, “natural law,” is simply a common and convenient term, whether truly descriptive or not, for indicating the undeniable fact that in Economics as in every other science, identical effects invariably proceed from identical causes.