“A distinguished zoologist, Mr. St. George Mivart,” writes Mr. Darwin, “has recently collected all the objections which have ever been advanced by myself and others against the theory of natural selection, as propounded by Mr. Wallace and myself, and has illustrated them with admirable art and force (“Natural Selection,” p. 176, ed. 1876). I have already referred the reader to Mr. Mivart's work, but quote the above passage as showing that Mr. Mivart will not, probably, be found to have left much unsaid that would appear to make against Mr. Darwin's theory. It is incumbent upon me both to see how far Mr. Mivart's objections are weighty as against Mr. Darwin, and also whether or not they tell with equal force against the view which I am myself advocating. I will therefore touch briefly upon the most important of them, with the purpose of showing that they are serious as against the doctrine that small fortuitous variations are the origin of species, but that they have no force against evolution as guided by intelligence and memory.

But before doing this, I would demur to the words used by Mr. Darwin, and just quoted above, namely, “the theory of natural selection.” I imagine that I see in them the fallacy which I believe to run through almost all Mr. Darwin's work, namely, that “natural selection” is a theory (if, indeed, it can be a theory at all), in some way accounting for the origin of variation, and so of species—“ natural selection,” as we have already seen, being unable to “induce variability,” and being only able to accumulate what—on the occasion of each successive variation, and so during the whole process—must have been originated by something else.