Part 36 (2/2)
Subsequently, Weismann and others reinterpreted Darwin's theory and strengthened its main propositions, abandoning the Lamarckian theory of use and disuse. Mendel, De Vries, and other biologists have added to the Darwinian theory by careful investigations into the heredity of plants and animals, but because Darwin was the first to give clear expression to the theory of evolution, ”Darwinism” is used to express the general theory.
Cosmic evolution, or the development of the universe, has been generally acknowledged by the acceptance of the results of the studies of geology, astronomy, and physics. History of plant and animal life is permanently written in the rocks, and their evolutionary process so completely demonstrated in the laboratory that few dare to question it.
Modern controversy hinges upon the a.s.sumption that man as an animal is not subjected to the natural laws of other animals and of plants, but that he had a special creation. The maintenance of this belief has led to many crude and unscientific notions of the origin of man and the meaning of evolution.
Evolution is very simple in its general traits, but very complex in its details. It is a theory of process and not a theory of creation. It is continuous, progressive change, brought about by natural forces and in accordance with natural laws. The evolutionist studies these changes and records the results obtained thereby. The scientist thus discovers new truths, {468} establishes the relation of one truth to another, enlarges the boundary of knowledge, extends the horizon of the unknown, and leaves the mystery of the beginning of life unsolved. His laboratory is always open to retest and clarify his work and to add new knowledge as fast as it is acquired.
Evolution as a working theory for science has correlated truths, unified methods, and furnished a key to modern thought. As a co-operative science it has had a stimulating influence on all lines of research, not only in scientific study of physical nature, but also in the study of man, for there are natural laws as well as man-made laws to be observed in the development of human society.
Some evolutionary scientists will be dogmatic at times, but they return to their laboratories and proceed to reinterpret what they have a.s.sumed, so that their dogmatism is of short duration. Theological dogmatists are not so fortunate, because of persistence of religious tradition which has not yet been put fully to the laboratory test.
Some of them are continuously and hopelessly dogmatic. They still adhere to belief founded on the emotions which they refuse to put to scientific test. Science makes no attempt to undermine religion, but is unconsciously laying a broader foundation on which religion may stand. Theologians who are beginning to realize this are forced to re-examine the Bible and reinterpret it according to the knowledge and enlightenment of the time. Thus science becomes a force to advance Christianity, not to destroy it.
On the other hand, science becomes less dogmatic as it applies its own methods to religion and humanity and recognizes that there is a great world of spiritual truth which cannot be determined by experiments in the physical laboratory. It can be estimated only in the laboratory of human action. Faith, love, virtue, and spiritual vision cannot be explained by physical and chemical reactions. If in the past science has rightly pursued its course of investigation regardless of spiritual truth, the future is full of promise that religion and human reactions and science will eventually work together in the pursuit of {469} truth in G.o.d's great workshop. The unity of truth will be thus realized.
The area of knowledge will be enlarged while the horizon of the unknown will be extended. The mystery of life still remains unsolved.
Galton followed along in the study of the development of race and culture, and brought in a new study of human life. Pasteur and Lister worked out their great factors of preventive medicine and health.
Madame Curie developed the radioactivity as a great contribution to the evolution of science. All of this represents the slow evolution of science, each new discovery quickening the thought of the age in which it occurred, changing the att.i.tude of the mind toward nature and life, and contributing to human comfort and human welfare. But the greatest accomplishment always in the development of science is its effect on the mental processes of humanity, stimulating thought and changing the att.i.tude of mind toward life.
_Science and War_.--It is a travesty on human progress, a social paradox, that war and science go hand in hand. On one side are all of the machines of destruction, the battles.h.i.+ps, bombing-planes, huge guns, high explosives, and poisonous gases, products of scientific experiment and inventive genius, and on the other ambulances, hospitals, medical and surgical care, with the uses of all medical discoveries. The one seeks destruction, the other seeks to allay suffering; one force destroys life, the other saves it. And yet they march forth under the same flag to conquer the enemy. It is like the conquest of the American Indians by the Spaniards, in which the warrior bore in one hand a banner of the cross of Christ and in the other the drawn sword.
War has achieved much in forcing people into national unity, in giving freedom to the oppressed and protecting otherwise helpless people, but in the light of our ideals of peace it has never been more than a cruel necessity, and, more frequently, a grim, horrible monster. Chemistry and physics and their discoveries underlying the vast material prosperity of moderns have contributed much to the mechanical and {470} industrial arts and increased the welfare and happiness of mankind.
But when war is let loose, these same beneficent sciences are worked day and night for the rapid destruction of man. All the wealth built up in the pa.s.sing years is destroyed along with the lives of millions of people.
Out of the gloom of the picture proceeds one ray of beneficent light, that of the service rendered by the discoveries of medical science and surgical art. The discoveries arising from the study of anatomy, physiology, bacteriology, and neurology, with the use of anaesthetics and antiseptics in connection with surgery, have made war less horrible and suffering more endurable. Scientists like Pasteur, Lister, Koch, Morton, and many others brought forth from their laboratories the results of their study for the alleviation of suffering.
Yet it seems almost incredible that with all of the horrid experiences of war, an enterprise that no one desires, and which the great majority of the world deplore, should so long continue. Nothing but the discovery and rise of a serum that will destroy the germs of national selfishness and avarice will prevent war. Possibly it stimulates activity in invention, discovery, trade and commerce, but of what avail is it if the cycle returns again from peace to war and these products of increased activity are turned to the destruction of civilization?
Does not the world need a baptism of common sense? Some gain is being made in the changing att.i.tude of mind toward the warrior in favor of the great scientists of the world. But nothing will be a.s.sured until the hero-wors.h.i.+p of the soldier gives way to the respect for the scholar, and ideals of truth and right become mightier than the sword.
_Scientific Progress Is c.u.mulative_.--One discovery leads to another, one invention to others. It is a law of science. Science benefits the common man more than does politics or religion. It is through science that he has means of use and enjoyment of nature's progress. It is true this is on the side of materialistic culture, and it does not provide all that is needed for the completed life. Even though the scientific {471} experiments and discoveries are fundamentally more essential, the common man cannot get along without social order, politics, or religion.
Perhaps we can get the largest expression of the value of science to man through a consideration of the inventions and discoveries which he may use in every-day life.[6] Prior to the nineteenth century we have to record the following important inventions: alphabetic writing, Arabic numbers, mariner's compa.s.s, printing, the telescope, the barometer and thermometer, and the steam-engine. In the nineteenth century we have to record: railroads, steam navigation, the telegraph, the telephone, friction matches, gas lighting, electrical lighting, photography, the phonograph, electrical transmission of power, Rontgen rays, spectrum a.n.a.lysis, anaesthetics, antiseptic surgery, the airplane, gasoline-engine, transmission of news by radio, and transportation by automobile. Also we shall find in the nineteenth century thirteen important theoretical discoveries as compared with seven in all previous centuries.
It is interesting to note what may have taken place also in the last generation. A man who was born in the middle of the last century might reflect on a good many things that have taken place. Scientifically he has lived to see the development of electricity from a mere academic pursuit to a tremendous force of civilization. Chemistry, although supposed to have been a completed science, was scarcely begun. Herbert Spencer's _Synthetic Philosophy_ and Darwin's _Origin of the Species_ had not yet been published. Huxley and Tyndall, the great experimental scientists, had not published their great works. Transportation with a few slow steam-propelled vessels crossing the ocean preceded the era of the great floating palaces. The era of railroad-building had only just started in America. Horseless carriages propelled by gas or electricity were in a state of conjecture. Politically in America the Civil War had not been fought or the Const.i.tution really completed.
The great wealth and stupendous business organization of {472} to-day were unknown in 1850. In Europe there was no German Empire, only a German Federation. The Hapsburgs were still holding forth in Austria and the Hohenzollerns in Prussia and the Romanoffs in Russia. The monarchial power of the old regime was the rule of the day. These are inst.i.tutions of the past. Civilization in America, although it had invaded the Mississippi valley, had not spread over the great Western plains nor to the Pacific coast. Tremendous changes in art and industries, in inventions and discoveries have been going on in this generation. The flying-machine, the radio, the automobile, the dirigible balloon, and, more than all, the tremendous business organization of the factories and industries of the age have given us altogether a complete revolution.
_Research Foundations_.--All modern universities carry on through instructors and advanced students many departments of scientific research. The lines of research extend through a wide range of subjects--Chemistry, Biology, Physics, Anatomy, Physiology, Medicine, Geology, Agriculture, History, Sociology, and other departments of learning. These investigations have led to the discovery of new knowledge and the extension of learning to mankind. Outside of colleges and universities there have been established many foundations of research and many industrial laboratories.
Prominent among those in the United States are The Carnegie Corporation and The Rockefeller Foundation, which are devoting hundreds of millions of dollars to the service of research, for the purpose of advancing science and directly benefiting humankind. The results play an important part in the protection and daily welfare of mankind. The Mellon Inst.i.tute contributes much to the solution of problems of applied chemistry.[7] It is interesting to note how the investigation carried on by these and other foundations is contributing directly to human welfare by mastering disease. The elimination of the hookworm disease, the fight to control malaria, the {473} mastery of yellow fever, the promotion of public health, and the study of medicine, the courageous attack on tuberculosis, and the suppression of typhoid fever, all are for the benefit of the public. The war on disease and the promotion of public health by preventive measures have lowered the death-rate and lengthened the period of life.
_The Trend of Scientific Investigations_.--While research is carried on in many lines, with many different objectives, it may be stated that intense study is devoted to the nature of matter and the direct connection of it with elemental forces. The theories of the molecule and the atom are still working hypotheses, but the investigator has gone further and disintegrated the atom, showing it to be a complex of corpuscles or particles. Scientists talk of electrons and protons as the two elemental forces and of the mechanics of the atom. In chemistry, investigation follows the problems of applied chemistry, while organic chemistry or biochemistry opens continually new fields of research. It appears that biology and chemistry are becoming more closely allied as researches continue and likewise physics and chemistry. In the field of surgery the X-ray is in daily use, and radium and radioactivity may yet be great aids to medicine. In medical investigation much is dependent upon the discoveries in neurology.
This also will throw light upon the studies in psychology, for the relation of nerve functions to mind functions may be more clearly defined.
Explorations of the earth and of the heavens continually add new knowledge of the extent and creation of the universe. The study of anthropology and archaeology throw new light upon the origin and early history of man. Experimental study of animals, food, soils, and crops adds increased means of sustenance for the race. Recent investigations of scientific education, along with psychology, are throwing much light on mental conditions and progress. And more recently serious inquiry into social life through the study of the social sciences is revealing the great problems of life. All of knowledge, all of science, and all of human invention which add to material {474} comforts will be of no avail unless men can learn to live together harmoniously and justly.
But the truths discovered in each department of investigation are all closely related. Truly there is but one science with many divisions, one universe with many parts, and though man is a small particle of the great cosmos, it is his life and welfare that are at the centres of all achievements.
SUBJECTS FOR FURTHER STUDY
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