It remains now to consider the original source of this truth.
In a previous paper I have spoken of the open secret, that there can be no social phenomena but what, if we analyse them to the bottom, bring us down to the laws of life; and that there can be no true understanding of them without reference to the laws of life. Let us, then, transfer this question of natural rights from the court of politics to the court of science -- the science of life. The reader need feel no alarm: its simplest and most obvious facts will suffice. We will contemplate first the general conditions to individual life; and then the general conditions to social life. We shall find that both yield the same verdict.
Animal life involves waste; waste must be met by repair; repair implies nutrition. Again, nutrition presupposes obtainment of food; food cannot be got without powers of prehension, and, usually, of locomotion; and that these powers may achieve their ends, there must be freedom to move about. If you shut up a mammal in a small space, or tie its limbs together, or take from it the food it has procured, you eventually, by persistence in one or other of these courses, cause its death. Passing a certain point, hindrance to the fulfilment of these requirements is fatal. And all this, which holds of the higher animals at large, of course holds of man.
If we adopt pessimism as a creed, and with it accept the implication that life in general being an evil should be put an end to, then there is no ethical warrant for these actions by which life is maintained: the whole question drops. But if we adopt either the optimist view or the meliorist view -- if we say that life on the whole brings more pleasure than pain; or that it is on the way to become such that it will yield more pleasure than pain; then these actions by which life is maintained are justified, and there results a warrant for the freedom to perform them. Those who hold that life is valuable, hold, by implication, that men ought not to be prevented from caring on life-sustaining activities. In other words, if it is said to be "right" that they should carry them on, then, by permutation, we get the assertion that they "have a right" to carry them on. Clearly the conception of "natural rights" originates in recognition of the truth that if life is justifiable, there must be a justification for the performance of acts essential to its preservation; and, therefore, a justification for those liberties and claims which make such acts possible.
But being true of other creatures as of man, this is a proposition lacking ethical character. Ethical character arises only with the distinction between what the individual may do in caring on his life-sustaining activities, and what he may not do.
This distinction obviously results from the presence of his fellows. Among those who are in close proximity, or even at some distance apart, the doings of each are apt to interfere with the doings of others; and in the absence of proof that some may do what they will without limit, while others may not, mutual limitation is necessitated. The non-ethical form of the right to pursue ends, passes into the ethical form, when there is recognized the difference between acts which can be performed without transgressing the limits, and others which cannot be so performed.
This, which is the a priori conclusion, is the conclusion yielded a posteriori, when we study the doings of the uncivilized. In its vaguest form, mutual limitation of spheres of action, and the ideas and sentiments associated with it, are seen in the relations of groups to one another. Habitually there come to be established, certain bounds to the territories within which each tribe obtains its livelihood; and these bounds, when not respected, are defended. Among the Wood-Veddahs, who have no political organization, the small clans have their respective portions of forest; and "these conventional allotments are always honourably recognized."(24*) Of the ungoverned tribes of Tasmania, we are told that "their hunting grounds were all determined, and trespassers were liable to attack."(25*) And, manifestly, the quarrels caused among tribes by intrusions on one another's territories, tend, in the long run, to fix bounds and to give a certain sanction to them. As with each inhabited area, so with each inhabiting group. A death in one, rightly or wrongly ascribed to somebody in another, prompts "the sacred duty of blood-revenge;" and though retaliations are thus made chronic, some restraint is put on new aggressions. Like causes worked like effects in those early stages of civilized societies, during which families or clans, rather than individuals, were the political units; and during which each family or clan had to maintain itself and its possessions against others such. This mutual restraint, which in the nature of things arises between small communities, similarly arises between individuals in each community; and the ideas and usages appropriate to the one are more or less appropriate to the other. Though within each group there is ever a tendency for the stronger to aggress on the weaker; yet, in most cases, consciousness of the evils resulting from aggressive conduct serves to restrain. Everywhere among primitive peoples, trespasses are followed by counter-trespasses.