Throughout the whole of the eighteenth century one man was at work on natural history who might have contributed much toward an answer to this question: this man was Buffon. His powers of research and thought were remarkable, and his gift in presenting results of research and thought showed genius. He had caught the idea of an evolution in Nature by the variation of species, and was likely to make a great advance with it; but he, too, was made to feel the power of theology.
As long as he gave pleasing descriptions of animals the Church petted him, but when he began to deduce truths of philosophical import the batteries of the Sorbonne were opened upon him; he was made to know that "the sacred deposit of truth committed to the Church" was, that "in the beginning God made the heavens and the earth" and that "all things were made at the beginning of the world." For his simple statement of truths in natural science which are to-day truisms, he was, as we have seen, dragged forth by the theological faculty, forced to recant publicly, and to print his recantation. In this he announced, "I abandon everything in my book respecting the formation of the earth, and generally all which may be contrary to the narrative of Moses."(21)
(21) For Descartes and his relation to the Copernican theory, see
Saisset, Descartes et ses Precurseurs; also Fouillee, Descartes, Paris,
1893, chaps. ii and iii; also other authorities cited in my chapter
on Astronomy; for his relation to the theory of evolution, see the
Principes de Philosophie, 3eme partie, S 45. For de Maillet, see
Quatrefages, Darwin et ses Precurseurs francais, chap i, citing
D'Archiac, Paleontologie, Stratigraphie, vol. i; also, Perrier, La
Philosophie zoologique avant Darwin, chap. vi; also the admirable
article Evolution, by Huxley, in Ency. Brit. The title of De Maillet's
book is Telliamed, ou Entretiens d'un Philosophe indien avec un
Missionaire francais sur la Diminution de la Mer, 1748, 1756. For
Buffon, see the authorities previously given, also the chapter on
Geology in this work. For the resistance of both Catholic and Protestant
authorities to the Linnaean system and ideas, see Alberg, Life of
Linnaeus, London, 1888, pp. 143-147, and 237. As to the creation
medallions at the Cathedral of Upsala, it is a somewhat curious
coincidence that the present writer came upon them while visiting that
edifice during the preparation of this chapter.
But all this triumph of the Chaldeo-Babylonian creation legends which the Church had inherited availed but little.
For about the end of the eighteenth century fruitful suggestions and even clear presentations of this or that part of a large evolutionary doctrine came thick and fast, and from the most divergent quarters. Especially remarkable were those which came from Erasmus Darwin in England, from Maupertuis in France, from Oken in Switzerland, and from Herder, and, most brilliantly of all, from Goethe in Germany.
Two men among these thinkers must be especially mentioned—Treviranus in Germany and Lamarck in France; each independently of the other drew the world more completely than ever before in this direction.
From Treviranus came, in 1802, his work on biology, and in this he gave forth the idea that from forms of life originally simple had arisen all higher organizations by gradual development; that every living feature has a capacity for receiving modifications of its structure from external influences; and that no species had become really extinct, but that each had passed into some other species. From Lamarck came about the same time his Researches, and a little later his Zoological Philosophy, which introduced a new factor into the process of evolution—the action of the animal itself in its efforts toward a development to suit new needs—and he gave as his principal conclusions the following:
1. Life tends to increase the volume of each living body and of all its parts up to a limit determined by its own necessities.
2. New wants in animals give rise to new organs.
3. The development of these organs is in proportion to their employment.