MAN AND EVOLUTION
Certain European philosophers agree that the species grows and develops, and that even change and alteration are also possible. One of the proofs that they give for this theory is that through the attentive study and verification of the science of geology it has become clear that the existence of the vegetable preceded that of the animal, and that of the animal preceded that of man. They admit that both the vegetable and the animal species have changed, for in some of the strata of the earth they have discovered plants which existed in the past and are now extinct; they have progressed, grown in strength, their form and appearance have changed, and so the species have altered. In the same way, in the strata of the earth there are some species of animals which have changed and are transformed. One of these animals is the serpent. There are indications that the serpent once had feet; but through the lapse of time those members have disappeared. In the same way, in the vertebral column of man there is an indication which amounts to a proof that, like other animals, he once had a tail. At one time that member was useful, but when man developed it was no longer of use, and therefore it gradually disappeared. As the serpent took refuge under the ground, and became a creeping animal, it was no longer in need of feet, so they disappeared; but their traces survive. The principal argument is this: that the existence of traces of members proves that they once existed; and as now they are no longer of service, they have gradually disappeared. Therefore while the perfect and necessary members have remained, those which are unnecessary have gradually disappeared by the modification of the species, but the traces of them continue. (307:4)

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