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416 strength, has given it new application, has clearly explained its workings, has been its prophet to the people. To fully understand the history and progress of the Darwinian theory, we must look back many years, and trace the influence which theology has had upon the advance of scientific knowledge.

For centuries the Bible was understood to contain a perfect, exact, undoubted account of the origin of the world. It was believed by everybody that the world was made in six days. The very imperfect acquaintance which the ancients had with geology and physics allowed them to accept this relation unchallenged. Faith was far stronger than reason; and, during the long ages in which the Church ruled supreme, this statement was accepted and implicitly believed by the whole race of Christians. But as men began to grow more enlightened,—as, one by one, the secrets of nature were revealed to the students whose desire for knowledge overbore their tacit acceptance of tradition,—doubts began to arise as to the possibility of the truth of this long-cherished idea. When the printing-press came, and enabled these ardent explorers to communicate freely the results of their studious labors, the leaven of discredit, thus disseminated, began to work in the mass, and the reason of men began to rise beneath the superincumbent theological pressure which had so long weighed upon it. The multitude of facts gathered together by these careful students became, by and by, so vast, and the conclusions to which they led so indubitable, that the theologians were forced, out of simple common-sense, to revise their expoundings of the sacred writings.

When it was found that the earth was made up of vast depositions of matter which contained the remains of long-extinct creatures, whose fragments were buried in solid rocks, once soft, oozy mud; when it was found that other rocks, hundreds of feet in thickness, were wholly composed of the imperishable remains of other extinct animals, which once lived and died and were gathered together in waters which broke over the very spot where these rocks now rise; when it was found that untold millions of years were necessary for the formation of one single group of these rocks, among many equally vast; when it was found that, in the memory of man, during the lapse of at least five thousand years, the earth had undergone no appreciable change; when it was found that the earth was the result of the action of laws existent in matter,—an upheaving, a washing away, a hardening, a disintegrating through a period of time beyond the conception of man,—the theologians were forced to substitute periods for days. When the old walls which had circumscribed man's mind became so crumbled as to allow of egress, individuals broke through them and revelled in the freedom of intelligent thought. When these walls were demolished by those who had themselves erected them, they were leaped, in all directions, by ardent explorers; and naturalists, no longer restrained by tradition, rushed upon voyages of discovery into the teeming world before them.

For a while this emancipation exhausted itself in the contemplation of the physical world, and an inquiry into brute life. Speculations and theories might riot in a past which was a practical eternity. They had unlimited space wherein to project, backward, the structure of the universe. But this long-stretching past was to be peopled only by the lower orders of animal life. The rocks were found to be filled with stony remains of animals who perished when the sandstone, which built old crumbling castles, was sea-shore mud; the chalk hills which bore them were found to be made up of myriads of little creatures. These humble representatives of life might be, must be, credited with a remote antiquity. But man was not an animal. He was a being apart. Although he was liable to heat and cold, disease and death, although his body was made of the same materials as the brute's, and was subject to the