I have stated, that in the thirteen species of ground-finches, a nearly perfect gradation may be traced, from a beak extraordinarily thick, to one so fine, that it may be compared to that of a warbler.
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Species do not grow more perfect: the weaker dominate the strong, again and again-the reason being that they are the great majority, and they are also cleverer. Darwin forgot the mind (- that is English!): the weak possess more mind. ... To acquire mind, one must need mind-one loses it when one no longer needs it.
We shall best understand the probable course of natural selection by taking the case of a country undergoing some slight physical change, for instance, of climate. The proportional numbers of its inhabitants will almost immediately undergo a change, and some species will probably become extinct.
If numerous species, belonging to the same genera or families, have really started into life all at once, the fact would be fatal to the theory of descent with slow modification through natural selection.
Judging from the past, we may safely infer that not one living species will transmit its unaltered likeness to a distant futurity.
On the ordinary view of each species having been independently created, we gain no scientific explanation.
We here see in two distant countries a similar relation between plants and insects of the same families, though the species of both are different. When man is the agent in introducing into a country a new species this relation is often broken
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