Nature

NATURE, natural, and the group of words derived from them, or allied to them in etymology, have at all times filled a great place in the thoughts and taken a strong hold on the feelings of mankind. That they should have done so is not surprising, when we consider what the words, in their primitive and most obvious signification, represent; but it is unfortunate that a set of terms which play so great a part in moral and metaphysical speculation, should have acquired many meanings different from the primary one, yet sufficiently allied to it to admit of confusion. The words have thus become entangled in so many foreign associations, mostly of a very powerful and tenacious character, that they have come to excite, and to be the symbols of, feelings which their original meaning will by no means justify; and which have made them one of the most copious sources of false taste, false philosophy, false morality, and even bad law.

The most important application of the Socratic Elenchus, as exhibited and improved by Plato, consists in dissecting large abstractions of this description; fixing down to a precise definition the meaning which as popularly used they merely shadow forth, and questioning and testing the common maxims and opinions in which they bear a part. It is to be regretted that among the instructive specimens of this kind of investigation which Plato has left, and to which subsequent times have been so much indebted for whatever intellectual clearness they have attained, he has not enriched posterity with a dialogue περὶ ϕύσεως. If the idea denoted by the word had been subjected to his searching analysis, and the popular commonplaces in which it figures had been submitted to the ordeal of his powerful dialectics, his successors probably would not have rushed, as they speedily did, into modes of thinking and reasoning of which the fallacious use of that word formed the corner stone; a kind of fallacy from which he was himself singularly free.

According to the Platonic method which is still the best type of such investigations, the first thing to be done with so vague a term is to ascertain precisely what it means. It is also a rule of the same method, that the meaning of an abstraction is best sought for in the concrete – of an universal in the particular. Adopting this course with the word Nature, the first question must be, what is meant by the “nature” of a particular object? as of fire, of [374] water, or of some individual plant or animal? Evidently the ensemble or aggregate of its powers or properties: the modes in which it acts on other things (counting among those things the senses of the observer) and the modes in which other things act upon it; to which, in the case of a sentient being, must be added, its own capacities of feeling, or being conscious. The Nature of the thing means all this; means its entire capacity of exhibiting phenomena. And since the phenomena which a thing exhibits, however much they vary in different circumstances, are always the same in the same circumstances, they admit of being described in general forms of words, which are called the laws of the thing’s nature. Thus it is a law of the nature of water that under the mean pressure of the atmosphere at the level of the sea, it boils at 212° Fahrenheit.

As the nature of any given thing is the aggregate of its powers and properties, so Nature in the abstract is the aggregate of the powers and properties of all things. Nature means the sum of all phenomena, together with the causes which produce them; including not only all that happens, but all that is capable of happening; the unused capabilities of causes being as much a part of the idea of Nature, as those which take effect. Since all phenomena which have been sufficiently examined are found to take place with regularity, each having certain fixed conditions, positive and negative, on the occurrence of which it invariably happens; mankind have been able to ascertain, either by direct observation or by reasoning processes grounded on it, the conditions of the occurrence of many phenomena; and the progress of science mainly consists in ascertaining those conditions. When discovered they can be expressed in general propositions, which are called laws of the particular phenomenon, and also, more generally, Laws of Nature. Thus, the truth that all material objects tend towards one another with a force directly as their masses and inversely as the square of their distance, is a law of Nature. The proposition that air and food are necessary to animal life, if it be as we have good reason to believe, true without exception, is also a law of nature, though the phenomenon of which it is the law is special, and not, like gravitation, universal.

Nature, then, in this its simplest acceptation, is a collective name for all facts, actual and possible: or (to speak more accurately) a name for the mode, partly known to us and partly unknown, in which all things take place. For the word suggests, not so much the multitudinous detail of the phenomena, as the conception which might be formed of their manner of existence as a mental whole, by a mind possessing a complete knowledge of them: to which conception it is the aim of science to raise itself, by successive steps of generalization from experience.

Such, then, is a correct definition of the word Nature. But this definition corresponds only to one of the senses of that ambiguous term. It is evidently [375] inapplicable to some of the modes in which the word is familiarly employed. For example, it entirely conflicts with the common form of speech by which Nature is opposed to Art, and natural to artificial. For in the sense of the word Nature which has just been defined, and which is the true scientific sense, Art is as much Nature as anything else; and everything which is artificial is natural – Art has no independent powers of its own: Art is but the employment of the powers of Nature for an end. Phenomena produced by human agency, no less than those which as far as we are concerned are spontaneous, depend on the properties of the elementary forces, or of the elementary substances and their compounds. The united powers of the whole human race could not create a new property of matter in general, or of any one of its species. We can only take advantage for our purposes of the properties which we find. A ship floats by the same laws of specific gravity and equilibrium, as a tree uprooted by the wind and blown into the water. The corn which men raise for food, grows and produces its grain by the same laws of vegetation by which the wild rose and the mountain strawberry bring forth their flowers and fruit. A house stands and holds together by the natural properties, the weight and cohesion of the materials which compose it: a steam engine works by the natural expansive force of steam, exerting a pressure upon one part of a system of arrangements, which pressure, by the mechanical properties of the lever, is transferred from that to another part where it raises the weight or removes the obstacle brought into connexion with it. In these and all other artificial operations the office of man is, as has often been remarked, a very limited one; it consists in moving things into certain places. We move objects, and by doing this, bring some things into contact which were separate, or separate others which were in contact: and by this simple change of place, natural forces previously dormant are called into action, and produce the desired effect. Even the volition which designs, the intelligence which contrives, and the muscular force which executes these movements, are themselves powers of Nature.

It thus appears that we must recognize at least two principal meanings in the word Nature. In one sense, it means all the powers existing in either the outer or the inner world and everything which takes place by means of those powers. In another sense, it means, not everything which happens, but only what takes place without the agency, or without the voluntary and intentional agency, of man. This distinction is far from exhausting the ambiguities of the word; but it is the key to most of those on which important consequences depend.

Such, then, being the two principal senses of the word Nature; in which of these is it taken, or is it taken in either, when the word and its derivatives are used to convey ideas of commendation, approval, and even moral obligation?

It has conveyed such ideas in all ages. Naturam sequi was the fundamental [376] principle of morals in many of the most admired schools of philosophy. Among the ancients, especially in the declining period of ancient intellect and thought, it was the test to which all ethical doctrines were brought. The Stoics and the Epicureans, however irreconcilable in the rest of their systems, agreed in holding themselves bound to prove that their respective maxims of conduct were the dictates of nature. Under their influence the Roman jurists, when attempting to systematize jurisprudence, placed in the front of their exposition a certain Jus Naturale, “quod natura”, as Justinian declares in the Institutes, “omnia animalia docuit”: and as the modern systematic writers not only on law but on moral philosophy, have generally taken the Roman jurists for their models, treatises on the so-called Law of Nature have abounded; and references to this Law as a supreme rule and ultimate standard have pervaded literature. The writers on International Law have done more than any others to give currency to this style of ethical speculation; inasmuch as having no positive law to write...