II. The Natural Law of the Economy Of Power, or the Law of Least Expenditure.

From the motive of which we have spoken, the roots of which lie deep in human nature and the conditions of human existence, we derive a first natural law, the Law of Economy in Production, or the Law of Least Expenditure. Under the spur of interest, man first satisfies his most pressing needs, those that appeal with the greatest urgency, or penalise deficient supply with the greatest amount of suffering. It is only after this that he endeavours to decrease expenditure by selecting the more remunerative spheres of activity, and by setting himself to perfect processes, or invent tools, which enable him to enhance the profits of production. By increasing the margin of gain, enlarging the excess Of material acquired or saved over the outlay of vital force, he also insures the preponderance of compensatory pleasure over the discomfort, which is inseparable from effort.

The individual whose income exceeds expenditure, who possesses a profit, may sink it in the purchase of immediate enjoyment, or collect it as capital to be employed in a further increase of his productive capacity. He may, also, simply hoard it against future need. It, then, serves the purpose of a twofold reserve, drafts upon which may obviate privations, or furnish the means of repelling such chances as may, hereafter, menace vitality. When individuals of the same, or of alien races, join issue as to who shall obtain the materials of subsistence, the victor is he who has devoted most profits to remunerative ends, to measures best fitted to conserve, or augment, his vital force.