He then passes to scientific demonstration. Is there, he asks, a material bond, a bodily, living, and enduring tie, between human beings of all lands and all ages?[63] He finds a proof that there is such a bond in the researches of Weismann and in that writer's theory of the germ plasm, which has now become classic.[64] In each individual, the cells of the germ plasm continue the life of the parents, of which, in the fullest sense of the word, they are living portions. They are undying. They pass, changeless, to our children and to our children's children. Thus there really persists throughout the whole genealogical tree a part of the same living substance. A portion of this organic unity lives in each individual and thereby we are physically connected with the universal community. Nicolai points out, in passing, the remarkable relationships between these scientific hypotheses of the last thirty years and certain mystical intuitions of the Greeks and the early Christians—"the spirit (pneuma) that quickeneth" (Saint John, vi, 63), the generative spirit, which is not only distinguished from the flesh, as Saint John declares, but is likewise distinguished from the soul, as appears from a passage in Saint Paul's first epistle to the Corinthians (xv, 44), where the "spiritual body" (soma pneumatikon) is contrasted with the "natural body" (soma psuchikon). The spiritual body is declared to be more essential than the natural body (the psychical or intellectual body); and the former really and materially penetrates the bodies of all men.
Nor is this all. The studies made by contemporary biologists, and notably by the Russian biologist Janicki, on sexual reproduction[65] have explained how this method of reproduction safeguards the homogeneity of the germ plasm in an animal species, and how it unceasingly renews the mutual contacts among the individual members of a race. Janicki writes: "The world, if I may say so, has not been broken up into a mass of independent fragments, which then, for ever isolated one from another, ... must strike out for themselves on straight courses, with only side branches. On the contrary, owing to bi-sexual reproduction (amphimixis), the image of the macrocosm is ... reflected as a microcosm in each part; and the macrocosm resolves itself into a thousand microcosms.... Thus the individuals, while remaining independent, are materially and continuously interconnected, like strawberry plants whose runners are joined together.... Each separate individual develops, as it were, through an invisible system of rhizomes (subterranean roots) which unite the germ substances of countless individualities."—Thus it has been calculated that in the twenty-first generation, in five hundred years let us say, and supposing an average of three children to each couple, the posterity of a single couple will be equal in number to the entire human race. It may, therefore, be said that each one of us has within him a small portion of the living substance belonging to every one of the human beings that were living five hundred years ago. Consequently it is absurd that anyone should wish to restrict an individual, be he whom he may, within the category of a separate nation or race.
Let us add that thought, too, propagates itself throughout mankind, in like manner with the germ plasm.
Every thought, once expressed, leads in the human community a life independent of its creator; undergoes development in other minds; and has, like the germ plasm, an immortal life. So that, in humanity, there is neither true birth nor true death, whether material or spiritual. Empedocles, of old, realised this, for he said:
"Yet another truth will I tell unto thee. Not a mortal thing is truly born, and death the destroyer is not the end. There is nought but intermixture and exchange of what is intermixed. But among men it is customary to term this 'birth.'"
Humanity, therefore, materially and spiritually, is a single organism; all its parts are intimately connected and share in a common development.
Upon these ideas there must now be grafted the concept of mutation and the observations of Hugo de Vries.—If this living substance which is common to all humanity should, at any time and owing to any influence, have acquired the capacity for changing[66] after a certain lapse of time, for instance a thousand years, then all those beings which have in them a share of this substance may suddenly undergo identical changes. It is well known that Hugo de Vries has observed such sudden variations in plants.[67] After centuries of stability in the characteristics of a species, quite suddenly, in a great number of individuals belonging to this species, there will one year occur a modification, the leaves becoming longer, or shorter, etc. Thenceforward this modification will be propagated as a constant feature, so that, by the following year, a new species will have come into existence.—The same thing happens among human beings, especially in the human brain; for, as far as man is concerned, the most striking instances of variation are found in the psychic domain. In each year, certain human beings present brain variations. Such abnormal individuals are sometimes regarded as madmen and sometimes as men of genius. They herald the coming variations of the species, variations of which they are the forerunners. At due date, the same peculiarities will suddenly manifest themselves throughout the species. Experience shows that transformations, or moral and social discoveries, appear at the same moment in the most widely separated and the most various countries. I have myself often been struck by this fact, both when studying history and when observing the men of my own day. Contemporary societies, at a great distance one from another and having no means of rapid intercommunication, will simultaneously exhibit the same moral and social phenomena. Hardly ever is a discovery born in the brain of a single inventor. At the same instant, other inventors happen upon it, anticipate it, or are hot upon the trail. The popular phrase runs, "the idea is in the air." When an idea is in the air, a mutation is about to occur in the human brain. We are, says Nicolai, on the eve of a "mutation of war." Moltke and Tolstoi represent the two great contrasted variations in human thought. Moltke extolled the ethical value of war; Tolstoi passed unqualified condemnation on war. Which of these two minds represents the variation of genius and which the variation of madness? In the light of contemporary events, most people would be inclined to give the palm to Moltke. But when an organism is about to undergo mutation, the change is often preluded by frequent and extensive variations. Of these divergent variations, those only persist which are best suited to the conditions of existence. Thus, in Nicolai's view, the ideas of Moltke and his disciples are a favourable presage that mutation is imminent.
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Whatever we may think of this hope that within the near future a mutation will occur leading to the formation of a humanity radically opposed to war, it is enough to watch the biological development of the extant world to acquire the belief that a new organisation, vaster and more peaceful, is at hand. In proportion as humanity evolves, communications between men are multiplied. During the last century there occurred a sudden and enormous improvement in the technical means for the exchange of ideas. To give one example only. In former days the circulation of letters throughout the whole world did not exceed one hundred thousand a year. To-day, the postal correspondence in Germany amounts to a milliard letters a year (15 per head), whereas formerly the number was 1 per 1,000 of the population. About forty years ago, in the countries which now form parts of the postal union, three milliards of letters, etc., were posted annually. By the year 1906 the number had increased to thirty-five milliards; and by 1914, to fifty milliards. (In Germany, 1 per head every 10 days; in Great Britain, 1 per head every 3 days.) We have further to consider the increased speed of communication. Distance no longer exists for the telegraph; "the entire civilised world has become a large room in which we can all talk with one another."
Such changes cannot fail to influence social life. In earlier times, any thought of union or federation between the various states of Europe remained utopian, were it only on account of the difficulty and slowness of communications. As Nicolai says, a state cannot extend to infinite proportions; it must be able to act promptly upon the different parts of its organism. To a certain extent, therefore, its size is a function of the rapidity of communications. In prehistoric times, a traveller could cover only about 12 miles a day; when wheeled traffic became established, the daily postal journey extended to 60 miles, and in the later days of mail-coach development, this distance was more than doubled; towards 1850, the railway service was able to cover 375 miles a day; modern trains range to 1,250 miles a day; an express service covering 6,000 miles or more a day is already within the scope of technical possibilities. For barbarians, the country was limited to a mountain valley. The states that existed at the close of the middle ages, states which have not greatly varied down to our times, were adapted in size to the possibilities of the mail coach. Now, such petty states are far too small. The modern man will no longer consent to be restricted in this way. He is continually crossing frontiers. He wants vast states, like those of America, Australia, Russia, or South Africa. We look forward to the days when, be it only for material reasons like the foregoing, the whole world will be a single state. Nothing that we can do will check this evolution; the change will come whether we like it or not. We can now understand that all earlier attempts to unite the nations of Europe, all those initiated in the middle ages and continued down to the nineteenth century, were rendered impossible of achievement by the lack of suitable material conditions. With the best will in the world, their realisation was impossible. But the requisite conditions exist to-day, and we may say that the organisation of contemporary Europe no longer corresponds to its biological development. Willy-nilly, Europe will have to adapt itself to the new conditions. The days of European unity have come. And the days of world-wide unity are at hand.[68]