But I may remark that naturalists are far from being agreed on this part of the subject. Agassiz rejects the evolution of man altogether. Mr. St. G. Mivart, while partly admitting, as every one else now does, the doctrine of evolution, denies the descent of man. Mr. Wallace, the great apostle of evolution, opposes Darwin, and will have none of his views on the descent of man; and Professor Huxley himself says that, while the resemblance of structure is such that if any "process of physical causation can be discovered by which the genera and families of ordinary animals have been produced, the process of causation is amply sufficient to account for the origin of man," still he admits that the gulf is vast between civilized man and brutes, and he is certain that "whether _from_ them or not, man is assuredly not _of_ them." The first difficulty I shall mention is, however, a structural one. Supposing that an ape-like ancestor developed into man, on the principles of natural selection; then his development has taken place in a manner directly contrary to the acknowledged law of natural selection. He has developed backwards; his frame is in every way weaker; he is wanting in agility; he has lost the prehensile feet; he has lost teeth fitted for fighting or crushing or tearing; he has but little sense of smell; he has lost the hairy covering, and is obliged to help himself by clothes.[1] If this loss was ornamental it is quite unlike any other development in this respect, since no other creature has the same; for ornamental purposes the fur becomes coloured, spotted, and striped, but not lost. It is easy to reply that man being _intelligent_, his brain power enables him to invent clothes, arms, implements, and so forth, which not only supply all deficiencies of structure, but give him a great superiority over all creatures. But how did he get that intelligence? By what natural process of causation (without intelligent direction) is it conceivable that, given a species of monkey, all at once and at a certain stage, structural development should have been retarded and actually reversed, and a development of brain structure alone set in? Nor, be it observed, has any trace of _man_ with a rudimentary brain ever been discovered. Savages have brains far in excess of their requirements, and can consequently be educated and improved. The skull of a prehistoric man found in the Neanderthal near Dusseldorf is of average brain capacity, showing that in those remote ages man was very much in capacity what he is at present. [Footnote 1: It is remarkable that the loss of the hairy covering is most complete when it is most wanted: the back, the spine, and the shoulders are in nearly all races unprotected; and yet the want of a covering from the heat or cold is such that the rudest savages have invented some kind of cloak for the back.]