with "a love of adulation such as would be despised in a human being." 1 Let science cease to deny deity, or to take materialism for granted. Mind and matter are, equally, relative phenomena, the double effect of an ultimate cause whose nature must remain unknown. The recognition of this Inscrutable Power is the core of truth in every religion, and the beginning of all philosophy.

2. Evolution

Having indicated the unknowable, philosophy surrenders it, and turns its face to what can be known. Metaphysics is a mirage: as Michelet put it, it is "the art of befuddling one's self methodically." The proper field and function of philosophy lies in the summation and unification of the results of science. "Knowledge of the lowest kind is un-unified knowledge; science is partially-unified knowledge; philosophy is completely-unified knowledge." 2 Such complete unification requires a broad and universal principle that will include all experience, and will describe the essential features of all knowledge. Is there a principle of this kind?

We may perhaps approach such a principle by trying to unify the highest generalizations of physics. These are the indestructibility of matter, the conservation of energy, the continuity of motion, the persistence of relations among forces (i. e., the inviolability of natural law), the transformability and equivalence of forces (even of mental and physical forces), and the rhythm of motion. This last generalization, not usually recognized, needs only to be pointed out. All nature is rhythmical, from the pulsations of heat to the vibrations of violin strings; from the undulations of light, heat and sound to the tides of the sea; from the periodicities of sex to the periodicities of planets and comets and stars; from the alternation of night and day to the succession of the seasons,

1 F. P., 103.

2 P. 119.

and perhaps to the rhythms of climatic change; from the oscillations of molecules to the rise and fall of nations and the birth and death of stars.

All these "laws of the knowable" are reducible (by an analysis which must not here be followed in detail) to the final law of the persistence of force. But there is something static and inert about this principle; it does not so much as hint at the secret of life. What is the dynamic principle of reality? What is the formula of the growth and decay of all things? It must be a formula of evolution and dissolution, for "an entire history of anything must include its appearance out of the imperceptible and its disappearance into the imperceptible." 1

So Spencer offers us his famous formula of evolution, which made the intellect of Europe gasp for breath, and required ten volumes and forty years for its explanation. "Evolution is an integration of matter and a concomitant dissipation of motion; during which the matter passes from an indefinite, incoherent homogeneity to a definite, coherent heterogeneity; and during which the retained motion undergoes a parallel transformation.” 2 What does this mean?

The growth of planets out of nebulae; the formation of oceans and mountains on the earth; the metabolism of elements by plants, and of animal tissues by men; the development of the heart in the embryo, and the fusion of bones after birth; the unification of sensations and memories into knowledge and thought, and of knowledge into science and philosophy; the development of families into clans and gentes and cities and states and alliances and the "federation of the world" here is the integration of matter, the aggregation of separate items into masses and groups and wholes. Such integration of course involves a lessening of motion in the parts, as the growing power of the state lessens the freedom of the individual; but at the same time it gives to the parts an inter

1 P. 253.

2 P. 367.

dependence, a protective tissue of relationships, which constitute "coherence" and promote corporate survival. The pro

cess brings, too, a greater definiteness of forms and functions: the nebula is shapeless, nebulous; and yet out of it come the elliptical regularity of the planets, the sharp lines of mountain-chains, the specific form and character of organisms and organs, the division of labor and specialization of function in physiological and political structures, etc. And the parts of this integrating whole become not merely definite but diverse, heterogeneous in nature and operation. The primeval nebula is homogeneous-i. e., it consists of parts that are alike; but soon it is differentiated into gases and liquids and solids; the earth becomes here green with grass, there white with mountain-tops, or blue with the multitudinous sea; evolving life begets, out of a relatively homogeneous protoplasm, the varied organs of nutrition, reproduction, locomotion, and perception; a simple language fills whole continents with its multiplying dialects; a single science breeds a hundred, and the folk-lore of a nation flowers into a thousand forms of literary art; individuality grows, character stands out uniquely, and every race and people develops its peculiar genius. Integration and heterogeneity, aggregation of parts into ever larger wholes and differentiation of parts into ever more varied forms: these are the foci of the orbit of evolution. Whatever passes from diffusion to integration and unity, and from a homogeneous simplicity to a differentiated complexity (cf. America, 1600-1900), is in the flow of evolution; whatever is returning from integration to diffusion, and from complexity to simplicity (cf. Europe 200–600 a. D.), is caught in the ebb of dissolution.

Not content with this synthetic formula, Spencer endeavors to show how it follows by inevitable necessity from the natural operation of mechanical forces. There is, first, a certain "Instability of the Homogeneous": i. e., similar parts cannot long remain similar because they are unevenly subjected to external forces; outer parts, e. g., are sooner attacked, like coast-line

towns in war; and the variety of occupations moulds similar men into the varied embodiments of a hundred professions and trades. There is, again, a "Multiplication of Effects": one cause may produce a vast variety of results, and help to differentiate the world; a word amiss, like Marie Antoinette's, or an altered telegram at Ems, or a wind at Salamis, may play an endless rôle in history. And there is the law of "Segregation": the parts of a relatively homogenous whole, being driven separate into different areas, are shaped by diverse environments into dissimilar products,— as the English become Americans, or Canadians, or Australians, according to the genius of the place. In these many ways the forces of nature build the variety of this evolving world.

But finally, and inescapably, comes "Equilibration." Every motion, being motion under resistance, must sooner or later come to an end; every rhythmic oscillation (unless externally reinforced) suffers some loss of rate and amplitude. The planets ride through a lesser orbit, or will ride, than once they rode; the sun will shine less warmly and brightly as the centuries pass away; the friction of the tides will retard the rotation of the earth. This globe, that throbs and murmurs with a million motions, and luxuriates into a million forms of riotously breeding life, will some day move more leisurely in its orbit and its parts; the blood will run cooler and more slowly in our dessicated veins; we shall not hurry any more; like dying races, we shall think of heaven in terms of rest and not of life; we shall dream of Nirvana. Gradually, and then rapidly, equilibration will become dissolution, the unhappy epilogue of evolution. Societies will disintegrate, masses will migrate, cities will fade into the dark hinterland of peasant life; no government will be strong enough to hold the loosened parts together; social order will cease to be even remembered. And in the individual too, integration will give way to disruption; and that coördination which is life will pass into that diffuse disorder which is death. The earth will be a chaotic

theatre of decay, a gloomy drama of energy in irreversible degradation; and it will itself be resolved into the dust and nebula from which it came. The cycle of evolution and dissolution will be complete. The cycle will begin again, and endless times again; but always this will be the dénouement. Memento mori is written upon the face of life; and every birth is a prelude to decay and death.

First Principles is a magnificent drama, telling with almost classic calm the story of the rise and fall, the evolution and dissolution, of planets and life and man; but it is a tragic drama, for which the fittest epilogue is Hamlet's word "The rest is silence." Is there any wonder that men and women nurtured on faith and hope rebelled against this summary of existence? We know that we must die; but as it is a matter that will take care of itself, we prefer to think of life. There was in Spencer an almost Schopenhauerian sense of the futility of human effort. At the end of his triumphant career he expressed his feeling that life was not worth living. He had the philosopher's disease of seeing so far ahead that all the little pleasant shapes and colors of existence passed under his nose unseen.

He knew that people would not relish a philosophy whose last word was not God and heaven, but equilibration and dissolution; and in concluding this First Part he defended with unusual eloquence and fervor his right to speak the dark truths that he saw.

Whoever hesitates to utter that which he thinks the highest truth, lest it should be too much in advance of the time, may reassure himself by looking at his acts from an impersonal point of view. Let him remember that opinion is the agency through which character adapts external arrangements to itself, and that his opinion rightly forms part of this agency-is a unit of force constituting, with other such units, the general power which works out social changes; and he will perceive that he may properly give utterance t