Note 315 — Chapter XVI

This term is used by Haeckel as synonymous with Pithecanthropoi, or the ape-like men, who are supposed to have immediately preceded Homo sapiens (History of Evolution, English trans., vol. ii., p. 293). In the next instalment of work I will consider what has to be said in favour of this view from the side of my anthropology. Meanwhile, it is sufficient to bear in mind that, as previously stated, great as is the psychological difference introduced by the faculty of speech, for the attainment of this faculty anatomical changes so minute as to be imperceptible were all that seem to have been required. “The argument, that because there is an immense difference between a man’s intelligence and an ape’s, therefore there must be an equally immense difference between their brains, appears to me to be about as well based as the reasoning by which one should endeavour to prove that, because there is a ‘great gulf’ between a watch that keeps accurate time and another that will not go at all, there is therefore a great structural hiatus between the two watches. A hair in the balance-wheel, a little rust on a pinion, a bend in a tooth of the escapement, a something so slight that only the practised eye of the watchmaker can discover it, may be the source of all the difference. And believing, as I do, with Cuvier, that the possession of articulate speech is the grand distinctive character of man (whether it be absolutely peculiar to him or not), I find it very easy to comprehend, that some equally inconspicuous structural difference may have been the primary cause of the immeasurable and practically infinite divergence of the human from the simian stirps” (Huxley, Man’s Place in Nature, p. 103).