Criticisms on Origin of Species - Thomas Henry Huxley (tohfa e dulha read online .txt) 📗

is helped and another is impeded; one tends to predominate, another to disappear; and thus the living world bears within itself, and is surrounded by, impulses towards incessant change.

But the truths just stated are as certain as any other physical laws, quite independently of the truth, or falsehood, of the hypothesis which Mr. Darwin has based upon them; and that M. Flourens, missing the substance and grasping at a shadow, should be blind to the admirable exposition of them, which Mr. Darwin has given, and see nothing there but a “derniere erreur du dernier siecle “—a personification of Nature—leads us indeed to cry with him: “O lucidite! O solidite de l’esprit Francais, que devenez-vous?”

M. Flourens has, in fact, utterly failed to comprehend the first principles of the doctrine which he assails so rudely. His objections to details are of the old sort, so battered and hackneyed on this side of the Channel, that not even a Quarterly Reviewer could be induced to pick them up for the purpose of pelting Mr. Darwin over again. We have Cuvier and the mummies; M. Roulin and the domesticated animals of America; the difficulties presented by hybridism and by Palaeontology; Darwinism a ‘rifacciamento’ of De Maillet and Lamarck; Darwinism a system without a commencement, and its author bound to believe in M. Pouchet, etc. etc. How one knows it all by heart, and with what relief one reads at p. 65—

“Je laisse M. Darwin!”

But we cannot leave M. Flourens without calling our readers’ attention to his wonderful tenth chapter, “De la Preexistence des Germes et de l’Epigenese,” which opens thus:—

“Spontaneous generation is only a chimaera. This point established, two hypotheses remain: that of ‘pre-existence’ and that of ‘epigenesis’. The one of these hypotheses has as little foundation as the other.” (P. 163.)

“The doctrine of ‘epigenesis’ is derived from Harvey: following by ocular inspection the development of the new being in the Windsor does, he saw each part appear successively, and taking the moment of ‘appearance’ for the moment of ‘formation’ he imagined ‘epigenesis’.” (P. 165.)

On the contrary, says M. Flourens (p. 167),

“The new being is formed at a stroke (‘tout d’un coup’) as a whole, instantaneously; it is not formed part by part, and at different times. It is formed at once at the single ‘individual’ moment at which the conjunction of the male and female elements takes place.”

It will be observed that M. Flourens uses language which cannot be mistaken. For him, the labours of von Baer, of Rathke, of Coste, and their contemporaries and successors in Germany, France, and England, are non-existent: and, as Darwin “imagina” natural selection, so Harvey ” imagina” that doctrine which gives him an even greater claim to the veneration of posterity than his better known discovery of the circulation of the blood.

Language such as that we have quoted is, in fact, so preposterous, so utterly incompatible with anything but absolute ignorance of some of the best established facts, that we should have passed it over in silence had it not appeared to afford some clue to M. Flourens’ unhesitating, ‘a priori’, repudiation of all forms of the doctrine of progressive modification of living beings. He whose mind remains uninfluenced by an acquaintance with the phenomena of development, must indeed lack one of the chief motives towards the endeavour to trace a genetic relation between the different existing forms of life. Those who are ignorant of Geology, find no difficulty in believing that the world was made as it is; and the shepherd, untutored in history, sees no reason to regard the green mounds which indicate the site of a Roman camp, as aught but part and parcel of the primeval hill-side. So M. Flourens, who believes that embryos are formed “tout d’un coup,” naturally finds no difficulty in conceiving that species came into existence in the same way.

 

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