THE RISE OF SCIENTIFIC INQUIRY
NEW ATTITUDES AFTER THE ELEVENTH CENTURY. From the beginning of the twelfth century onward, as we have already noted, there had been a slow but gradual change in the character of human thinking, and a slow but certain disintegration of the Mediaeval System, with its repressive attitude toward all independent thinking. Many different influences and movements had contributed to this change—the Moslem learning and civilization in Spain, the recovery of the old legal and medical knowledge, the revival of city life, the beginnings anew of commerce and industry, the evolution of the universities, the rise of a small scholarly class, the new consciousness of nationality, the evolution of the modern languages, the beginnings of a small but important vernacular literature, and the beginnings of travel and exploration following the Crusades—all of which had tended to transform the mediaeval man and change his ways of thinking. New objects of interest slowly came to the front, and new standards of judgment gradually were applied. In consequence the mediaeval man, with his feeling of personal insignificance and lack of self- confidence, came to be replaced by a small but increasing number of men who were conscious of their powers, possessed a new self-confidence, and realized new possibilities of intellectual accomplishment.
The Revival of Learning, first in Italy and then elsewhere in western Europe, was the natural consequence of this awakening of the modern spirit, and in the careful work done by the humanistic scholars of the Italian Renaissance in collecting, comparing, questioning, inferring, criticizing, and editing the texts, and in reconstructing the ancient life and history, we see the beginnings of the modern scientific spirit. It was this same critical, questioning spirit which, when applied later to geographical knowledge, led to the discovery of America and the circumnavigation of the globe; which, when applied to matters of Christian faith, brought on the Protestant Revolts; which, when applied to the problems of the universe, revealed the many wonderful fields of modern science; and which, when applied to government, led to a questioning of the divine right of kings and the rise of constitutional government. The awakening of scientific inquiry and the scientific spirit, and the attempt of a few thinkers to apply the new method to education, to which we now turn, may be regarded as only another phase of the awakening of the modern inquisitive spirit which found expression earlier in the rise of the universities, the recovery and reconstruction of the ancient learning, the awakening of geographical discovery and exploration, and the questioning of the doctrines and practices of the Mediaeval Church.
INSUFFICIENCY OF ANCIENT SCIENCE. From the point of view of scientific inquiry, all ancient learning possessed certain marked fundamental defects. The Greeks had—their time and age in world-civilization considered—made many notable scientific observations and speculations, and had prepared the way for future advances. Thales (636?-546? B.C.), Xenophanes (628?-520? B.C.), Anaximenes (557-504 B.C.), Pythagoras (570- 500 B.C.), Heraclitus (c. 500 B.C.), Empedocles (460?-361? B.C.), and Aristotle (384-322 B.C.) had all made interesting speculations as to the nature of matter, [1] Aristotle finally settling the question by naming the world-elements as earth, water, air, fire, and ether. Hippocrates (460-367? B.C.), as we have seen (p. 197), had observed the sick and had recorded and organized his observations in such a manner [2] as to form the foundations upon which the science of medicine could be established. The Greek physician, Galen (130-200 A.D.) added to these observations, and their combined work formed the basis upon which modern medical science has slowly been built up.
On the other hand, some of what each wrote was mere speculation and error, [3] and modern physicians were compelled to begin all over and along new lines before any real progress in medicine could be made. Aristotle had done a notable work in organizing and codifying Greek scientific knowledge, as the list of his many scientific treatises in use in Europe by 1300 (R. 87) will show, but his writings were the result of a mixture of keen observation and brilliant speculation, contained many inaccuracies, and in time, due to the reverence accorded him as an authority by the mediaeval scholars and the church authorities, proved serious obstacles to real scientific progress.
At Alexandria the most notable Greek scientific work had been done. Euclid (323-283 B.C.) in geometry; Aristarchus (third century B.C.), who explained the motion of the earth; Eratosthenes (270-196 B.C.), who measured the size of the earth; Archimedes (270?-212 B.C.), a pupil of Euclid's, who applied science in many ways and laid the foundations of dynamics; Hipparchus (160-125 B.C.), the father of astronomy, who studied the heavens and catalogued the stars, were among the more famous Greeks who studied and taught there in the days when Alexandria had succeeded Athens as the intellectual capital of the Greek world. Some remarkable advances also were made in the study of human anatomy and medicine by two Greeks, Herophilus (335-280 B.C.) and Erasistratus (d. 280 B.C.), who apparently did much dissecting.
But even at Alexandria the promise of Greek science was unfulfilled. Despite many notable speculations and scientific advances, the hopeful beginnings did not come to any large fruitage, and the great contribution made by the Greeks to world civilization was less along scientific lines than along the lines of literature and philosophy. Their great strength lay in the direction of philosophic speculation, and this tendency to speculate, rather than to observe and test and measure and record, was the fundamental weakness of all Greek science. The Greeks never advanced in scientific work to the invention and perfection of instruments for the standardization of their observations. As a result they passed on to the mediaeval world an extensive "book science" and not a little keen observation, of which the works of Aristotle and the Alexandrian mathematicians and astronomers form the most conspicuous examples, but little scientific knowledge of which the modern world has been able to make much use. The "book science" of the Greeks, and especially that of Aristotle, was highly prized for centuries, but in time, due to the many inaccuracies, had to be discarded and done anew by modern scholars.
The Romans, as we have seen (chapter III), were essentially a practical people, good at getting the work of the world done, but not much given to theoretical discussion or scientific speculation. They were organizers, governors, engineers, executives, and literary workers rather than scientists. They executed many important undertakings of a practical character, such as the building of roads, bridges, aqueducts, and public buildings; organized government and commerce on a large scale; and have left us a literature and a legal system of importance, but they contributed little to the realm of pure science. The three great names in science in all their history are Strabo the geographer (63 B.C.-24 A.D.); Pliny the Elder (23-79 A.D.), who did notable work as an observer in natural history; and Galen (a Roman-Greek), in medicine. They, like the Greeks, were pervaded by the same fear that their science might prove useful, whereas they cultivated it largely as a mental exercise (R. 203).
THE CHRISTIAN REACTION AGAINST INQUIRY. The Christian attitude toward inquiry was from the first inhospitable, and in time became exceedingly intolerant. The tendency of the Western Church, it will be remembered (p. 94), was from the first to reject all Hellenic learning, and to depend upon emotional faith and the enforcement of a moral life. By the close of the third century the hostility to pagan schools and Hellenic learning had become so pronounced that the Apostolic Constitutions (R. 41) ordered Christians to abstain from all heathen books, which could contain nothing of value and only served "to subvert the faith of the unstable." In 401 A.D. the Council of Carthage forbade the clergy to read any heathen author, and Greek learning now rapidly died out in the West. For a time it was almost entirely lost. In consequence Greek science, then best represented by Alexandrian learning, and which contained much that was of great importance, was rejected along with other pagan learning. The, very meager scientific knowledge that persisted into the Middle Ages in the great mediaeval textbooks (p. 162), as we have seen in the study of the Seven Liberal Arts (chapter VII), came to be regarded as useful only in explaining passages of Scripture or in illustrating the ways of God toward man. The one and only science worthy of study was Theology, to which all other learning tended (see Figure 44, p. 154).
The history of Christianity throughout all the Dark Ages is a history of the distrust of inquiry and reason, and the emphasis of blind emotional faith. Mysticism, good and evil spirits, and the interpretation of natural phenomena as manifestations of the Divine will from the first received large emphasis. The worship of saints and relics, and the great development of the sensuous and symbolic, changed the earlier religion into a crude polytheism. During the long period of the Middle Ages the miraculous flourished. The most extreme superstition pervaded all ranks of society. Magic and prayers were employed to heal the sick, restore the crippled, foretell the future, and punish the wicked. Sacred pools, the royal touch, wonder-working images, and miracles through prayer stood in the way of the development of medicine (R. 204). Disease was attributed to satanic influence, and a regular schedule of prayers for cures was in use. Sanitation was unknown. Plagues and pestilences were manifestations of Divine wrath, and hysteria and insanity were possession by the devil to be cast out by whipping and torture. One's future was determined by the position of the heavenly bodies at the time of birth. Eclipses, meteors, and comets were fearful portents of Divine displeasure: