XI. BIOLOGICAL THEORIES, EVOLUTION, RECAPITULATION.
Of course only those who are quite unfamiliar with the history of philosophic thought are apt to think that the theory of evolution is modern. Serious students of biology are familiar with the long history of the theory, and especially its anticipations by the Greeks. Very few know, however, that certain phases of evolutionary theory attracted not a little attention from the scholastic philosophers. It would not be difficult to find expressions in Roger Bacon and Albertus Magnus, that would serve to show that they thought not only of the possibility of some very intimate relation of species but of developmental connections. The great teacher of the time, St. Thomas Aquinas, has some striking expressions in the matter, which deserve to be quoted, because he is the most important representative of the philosophy and science of the century and the one whose works most influenced succeeding generations. In the lecture on Medieval Scientific Universities, published in "Education, How Old the New" (Fordham University Press, N. Y., 1910), I called particular attention to this phase of St. Thomas' teaching. Two quotations will serve to make it clear here.
Prof. Osborne, in "From the Greeks to Darwin," quotes Aquinas' commentary on St. Augustine's opinion with regard to the origin of things as they are. Augustine declared that the Creator had simply [{444}] brought into life the seeds of things, and given these the power to develop. Aquinas, expounding Augustine, says:
"As to production of plants, Augustine holds a different view, … for some say that on the third day plants were actually produced, each in his kind—a view favored by the superficial reading of Scripture. But Augustine says that the earth is then said to have brought forth grass and trees causaliter; that is, it then received power to produce them." (Quoting Genesis ii:4): "For in those first days, … God made creation primarily or causaliter, and then rested from His work."
Like expressions might be quoted from him, and other writers of the Thirteenth Century might well be cited in confirmation of the fact that while these great teachers of the Middle Ages thoroughly recognize the necessity for creation to begin with and the placing by the Creator of some power in living things that enables them to develop, they were by no means bound to the thought that all living species were due to special creations. They even did not hesitate to teach the possibility of the lower order of living beings at least coming into existence by spontaneous generation, and would probably have found no difficulty in accepting a theory of descent with the limitations that most scientific men of our generation are prone to demand for it.
Lest it should be thought that this is a mere accidental agreement with modern thought, due much more to a certain looseness of terms than to actual similarity of view, it seems well to point out how close St. Thomas came to that thought in modern biology, which is probably considered to be one of our distinct modern contributions to the theory of evolution, though, in recent years, serious doubts have been thrown on it. It is expressed by the formula of Herbert Spencer, "Ontogeny recapitulates phylogeny." According to this, the completed being repeats in the course of its development the history of the race, that is to say, the varying phases of foetal development from the single cell in which it originates up to the perfect being of the special type as it is born into the world, retrace the history by which from the single cell being the creature in question has gradually developed.
It is very curious to find that St. Thomas Aquinas, in his teaching with regard to the origin and development of the human being, says, almost exactly, what the most ardent supporters of this so-called fundamental biogenetic law proclaimed during the latter half of the Nineteenth Century, thinking they were expressing an absolutely new thought. He says that "the higher a form is in the scale of being and the farther it is removed from mere material form, the more intermediate forms must be passed through before the finally perfect form is reached. Therefore, in the generation of animal and man— these having the most perfect forms—there occur many intermediate forms in generations, and consequently destruction, because the [{445}] generation of one being is the destruction of another." St. Thomas draws the ultimate conclusions from this doctrine without hesitation. He proclaims that the human material is first animated by a vegetative soul or principle of life, and then by an animal soul, and only ultimately when the matter has been properly prepared for it by a rational soul. He said: "The vegetative soul, therefore, which is first in embryo, while it lives the life of a plant, is destroyed, and there succeeds a more perfect soul, which is at once nutrient and sentient, and for that time the embryo lives the life of an animal: upon the destruction of this there succeeds the rational soul, infused from without."
XII. THE POPE OF THE CENTURY.
The absence of a chapter on the Pope of the Century has always seemed a lacuna in the previous editions of this book. Pope Innocent III., whose pontificate began just before the century opened, and occupied the first fifteen years of it, well deserves a place beside Francis the Saint, Thomas the Scholar, Dante the Poet, and Louis the Monarch of this great century. More than any other single individual he was responsible for the great development of the intellectual life that took place, but at the same time his wonderfully broad influence enabled him to initiate many of the movements that meant most for human uplift and for the alleviation of suffering in this period. It was in Councils of the Church summoned by him that the important legislation was passed requiring the development of schools, the foundation of colleges in every diocese and of universities in important metropolitan sees. What he accomplished for hospitals has been well told by Virchow, from whom I quote a magnanimous tribute in the chapter on the Foundation of City Hospitals. The legislation of Innocent III. did much to encourage, and yet to regulate properly the religious orders of this time engaged in charitable work. Besides doing so much for charity, he was a stern upholder of morals. As more than one king of the time realized while Innocent was Pope, there could be no trifling with marriage vows.
On the other hand, while Innocent was so stern as to the enforcement of marriage laws, his wonderfully judicious character and his care for the weak and the innocent can be particularly noted in his treatment of the children in these cases. While he compelled recalcitrant kings to take back the wives they would repudiate, and put away other women who had won their affections, he did not hesitate to make due provision as far as possible for the illegitimate children. Pirie Gordon, in his recent life of Pope Innocent III., notes that he invariably legitimated the offspring of these illegal unions of kings, and even declared them capable of succession. He would not visit the guilt of the parent on the innocent offspring.