How far such conditions were sufficient I cannot even guess; but at least an allowance must be made for them before we can argue from the achievements to the intrinsic power of the race which achieved. I do not see that it is even "proved" that the average Athenian was in the least superior in this sense to the average Englishman. It would require a lifetime of study to pronounce any opinion worth having. I fully confess that, so far as a vague impression is worth anything, it is the most obvious impression, after looking at the Elgin marbles, that the Greeks were possessed of a finer organisation than ourselves. Still, I cannot accept as certain the quasi-mathematical formula that the Greek is to the Englishman as the Englishman to the negro. This, however, suggests another and very difficult series of problems. Mr. Kidd is arguing against intellectual superiority. He, of course, does not argue that the general superiority of a race leads to its disappearance; but that a one-sided superiority--an improvement of one set of faculties at the expense of others--may have that result. This at once suggests a whole series of psychological problems. The intellect and the emotional nature are not two separate organs, each capable of independent development. Every mental process involves both, and neither faculty can be developed without reference to the other. Mr. Kidd accepts the conclusion that certain primitive races were as clever as ourselves, because their brains were as large. If the argument be sound, it proves equally that their emotional nature was as well developed as ours; for no one can doubt that the brain is the physical condition of feeling as well as of thought. Even the most abstract thought, as he elsewhere notices, implies certain moral qualities. Newton remarked that he was superior to other men, not because his intellect was clearer, but because he attended more persistently to his problems. The statement, I think, involves a fallacy. Newton himself, no doubt, did better the longer he kept a problem before him. He inferred, unjustifiably, that of two different men, the one who could keep up his attention longest would be the best. That does not follow. The difference may indeed be moral as well as intellectual; and it is quite true that a power of sustained attention is of the highest importance in mathematics, and that that power supposes a moral quality; but, conversely, the power of attention probably implies also the power of clear intellectual vision. A muddle-headed man would find attention useless. This is, of course, still clearer in the case where the mind is exercised upon questions of human interest. The statesman and the dramatist both depend upon their power of sympathy and the strength of their emotions, as much as upon their logical capacity. To feel for others I must imagine their position: if I imagine it, I can hardly avoid feeling for them. "Altruism" is the product, in other words, of a