Only science, specifically so called, is more than such a casual, merely personal study of a new situation. Science is the distinct work of a distinct class abstractly studying a new situation that has confronted the progress not of an individual, but of a whole people, and in this character it gets at once all the advantages and all the conceits that belong in general to the life of a class. It gets, too, all the limitations. Science, once more, is not strictly a personal experience, although in personal experience, like that of the cross-country runner, we can get a glimpse of just that which may develop into science. Science is characteristically a profession. The runner withholds his running for a time and merely looks and studies, yet his looking is only for a time; sooner or later he will run again; and even while he studies there is his continued moving about, his instrumental action, as we called it; but the professional scientist waives all thought of possible future activity. Although in reality his looking is before leaping, it is not consciously so for him; he is one who under the constraints of his class merely looks and studies, making of these processes things quite worthy in themselves.

In other words, to enlarge somewhat on what has just been said, the rise of the profession of science does indeed involve both the same check upon the "real life" and the same reduction of activity to a purely mechanical or instrumental character that we have pointed out in the case of the runner at the bank of the stream, but a number of different social classes divides the labour. In general, society as a means to the expression and development of human activity, be the activity running or living in a broader and fuller sense, always shows the different phases or factors of the experience identified more or less exclusively with as many different classes or groups, and, in respect to the particular case here under consideration, upon the rise of science society appears to delegate the work of careful observation and critical thinking to a separate class, which, as already suggested, gives up any direct responsibility to the real life. Another distinct class, arising contemporaneously, is composed of those who do feel directly responsible, or "practical," continuing the life of positive, overt action. This second class maintains the vital processes, although in a more or less consciously instrumental way, since its members have the lives of others as well as their own lives to support. So society gets its workers or labourers as well as its observers and thinkers.

The rise of science, then, involves a disrupted society. Moreover, the division is by no means so simple as the foregoing analysis may seem to have implied. Observing and thinking, for example, have often made, too, separate sub-classes, and also there have been many distinct groups among the workers, such as clerks, soldiers, artisans, road-menders, and tillers of the soil. The simple analysis, however, has been quite enough to show, what has seemed to need emphasis, that all the passions of social life, or rather of social caste, are brought to bear upon the profession of science, giving it the peculiar conceits and advantages of class or caste, and also imposing upon it the peculiar limitations. The advantages, among others, are the strength that lies in union, and the long continuity and the imitation that always ensure an accumulation of experience and a refinement of method and an attainment to impersonal, impartial standards; the conceits are exclusiveness, sense of sanctity or intrinsic worth, and consequent claims to aristocracy; and the limitations, although possibly already quite obvious, are hereafter to be pointed out. But whatever the limitations or the opportunities, it is now our chief concern that the social conditions of its rise must greatly intensify the abstraction of science, the treatment of the consciousness of the world, which is but the sphere of action, the totality of the manifested conditions of action, as something to be cultivated wholly for its own sake.

Nor is this fact that science is an abstraction, intensified by the conditions of class life, the only fact to which the rise of science bears witness. There is something else equally significant—something, indeed, so intimately involved in this as perhaps not properly to be referred to as another fact at all, being only a further manifestation of what is already before us. There never arises abstraction without duplicity.

Plainly a disrupted society, such as has been seen to be incident to the rise of science, means also a disrupted life. In general the corporate life of any single class resulting from the division can be only partial, I do not say in respect to "real life," since this phrase has itself been associated with too narrow a meaning, but to human nature, to human life in its entirety, in its real fulness, in its true breadth and its true depth. All class life, I repeat, involving as it does disruption and selection of some particular interest or relation, is inadequate to any human being, and the life of science is no exception to this rule. Membership in any class and conformity to its peculiar life, which is partial and abstract as partial, have never satisfied anybody, and the life of the professional scientist, again, is no exception to this rule. Accordingly any abstraction in life, the isolation of any specific interest, when seen in just the light of its necessary inadequacy, of its definite, more or less exclusive partiality, must imply in life a demand for reality and completeness, and this the more as the abstraction is assertive, as the isolation is insistent. Simply, the whole life will never brook an untempered neglect from any of its always self-assertive parts. Plainly, however, as plainly as a disrupted society must mean a disrupted life for each resulting group, such a demand can be met only in one way, if the cause for it continues; it can be met only by some form of duplicity, by some way in which, however indirectly, the life of those concerned will always really be more than it seems or will always actually imply what explicitly or formally it appears to exclude. No such narrow life, in short, as must always characterize any social group, can ever be without its compensating innuendoes or indirections for the life from which it is outwardly aloof, and while the peculiar manner in which the true reality and the wholeness of life are thus conserved will very naturally always be determined by the particular class or the particular class-character involved, being of one sort for road-menders and of quite a different sort for scientific observers, the organization of society seems bound at every turn to show that duplicity, compensation as it always is for partiality, is an indispensable condition. Duplicity, whatever may be its own special dangers, is always better, being nearer to reality, than narrowness.

Is not the road-mender also a good Catholic, or in some other way, conventional or unconventional, religiously devout, piously doing, not his own, but another's work? Does not the scientist give point to the idea of another and different life, that is to say, of his life of knowledge not being the whole of life, by the agnosticism which he not only carefully asserts but also actually embodies as a factor in his method? The road-mender slaves at his humble task, ignorant and yet trustful, believing in an infallible wisdom and an absolute power, and the scientist lives with great enthusiasm to know the world as it is, but tells us at the same time with no less enthusiasm and with a meaning that certainly ought to temper his exclusiveness that the object which he studies and describes is nevertheless really unknowable. To quote Mr. Spencer: "The man of science ... more than any other, truly knows that in its ultimate essence nothing can be known." Surely there is meaning for Stevenson's story of Dr. Jekyll and Mr. Hyde in other fields besides that of morality. Class life must always involve its members in a protective or compensating duplicity.

But now, whatever in the life of other classes this duplicity, which conserves the wholeness of life even when formally life is narrow and partial, ought to be called, in the profession of science it often goes under the name of dualism. Seen at different angles, it is now dualism, now objectivism, now agnosticism. In each of these different ways the scientist, quite outdoing or transcending his profession, recognizes a sphere of reality or a sphere of activity, that is beyond that of the knowledge which he makes his special business, and, as is very important to observe, the peculiar manner of his recognition of this sphere, or the peculiar character of his duplicity, is relative to just the abstraction which makes his science what it is. Thus his peculiar duplicity is one of conscious subject and unconscious, external object, of observing man and objective nature, of real knowledge and unknowable reality.

Yet here, before discussing further the relation of dualism to science, it is well to observe that the positive history of science justifies the account of its rise which has now been given. The age of science among the Greeks was coincident with the closing conflict between Greek civilization and the general life of the Mediterranean, and the age of modern science began, not to attempt a long story, with the discovery of America. All "looking before leaping" is transitional or revolutionary, and while, of course, there had been transitions and degrees of scientific inquiry before, the science of the Greeks belongs to that very critical transition from Greece to Rome; and modern science, to the transition, certainly not less critical, from Christendom to—who can say to what? But not only does history show science to arise when there is a stream to cross; also it shows the life of the time, in the first place, to be sharply disintegrated, its different factors being separately and abstractly expressed through as many different social groups, and, in the second place, in each of the groups to be given to double living, to the storm and stress of being one thing and seeming another. Always an age, conspicuously and characteristically scientific, has been an age of clearly developed classes and of a general duplicity in living.

Thus, to give a striking, although possibly too philosophical an illustration of the duplicity, Democritus, the great materialist and atomist, and Plato, the great idealist, were contemporaries and equally were creatures of their day and generation, and their century was the century of great achievements in Greek science. Moreover, as regards the coincident organization of society, we know at least of Plato that he was keenly conscious of the divisions of society into distinct classes. And in very much the same way materialism and idealism, not to mention hedonism and rigorism, or naturalism and supernaturalism, have been inseparately associated with the rise and the successes of modern science. These philosophies, it must be remembered, are always more than so many conflicting "isms." They are, too, more than the special conceits, in theory or in practice, of so many separate social classes or of the great leaders of these classes. In their very differences they are the definite, the "public" expression of a conflict, or division, that inwardly affects every individual member, whatever his class or profession, which the society contains. In the day and generation of Democritus and Plato were there not well-defined parties, manifest in all the different and separately organized phases of life—moral, industrial, political or religious, namely, the parties of the conservatives and the radicals? And were there not also, as typical individual characters, each of them revealing to everybody something present within his own life, the only conventional loyalist and the more truly loyal reformer, as well as the idle or careless transgressor and the coldly calculating traitor? A life so divided and so variously impersonated was certainly teeming with duplicity.

Nor have we yet finished with the evidence from history. An age of science has always been not merely an age with a stream to cross, nor yet merely an age of classes and double living, but also an age of a thoroughly conscious utilitarianism. Whether materialistically or idealistically, all things have been treated and also looked upon as means to some end, not ends in themselves. For the disrupted society all activity has been more or less consciously calculating and instrumental. As we know, the disruption means actual, when not also intentional, division of labour, and surely there never has been division of labour without eventual development of a distinct sense of the various special instruments and activities as utilities rather than things of intrinsic value. For a time, it is true, the several classes and their activities may maintain the semblance of conservatism and independence; but their inevitable duplicity is bound sooner or later to give a consciously conventional or utilitarian character to the conservatism, and just this makes the activity of the people instrumental or only mediately instead of immediately worthy. If, as some are sure to contend, the division of labour always tends to end, and often does end, in the formation of castes, and in consequence the instrumental character of the activities is forgotten, it needs only to be said in reply that an invitation is then given to some outside power to step in and to make use of, instead of just treasuring or hoarding, the developed instruments or utilities. Caste in the organization of society not only induces absolutism at home, but also, and in this way is fully revealed its real but suppressed utilitarianism, invites conquest from abroad. The days of Greek science were, almost notoriously, days of conventionalism and utilitarianism: witness the Sophists and their teaching, and the life which they waited upon for pay; while the surviving conservatism, by which, as cannot be questioned, the life of the time was blind to its own real mission or purpose, made possible and even historically necessary, first, the Macedonian, and then the Roman conquest of Greece. What the Greeks, being too conservative, though utilitarian, failed to make full use of, another people, less hampered by tradition, finally appropriated. And as for the days of modern science, these, so far as unfolded to our view, have not been unlike in kind: witness the Machiavellism, with which they began, and the spirit of commercialism, which has characterized them throughout.