It may possibly be that, when the historian of the future looks back over the history of the intellectually freed and active sexes for countless generations, that a decided preference of the female intellect for mathematics, engineering, or statecraft may be made clear; and that a like marked inclination in the male to excel in acting, music, or astronomy may by careful and large comparison be shown.

But, for the present, we have no adequate scientific data from which to draw any conclusion, and any attempt to divide the occupations in which male and female intellects and wills should be employed, must be to attempt a purely artificial and arbitrary division: a division not more rational and scientific than an attempt to determine by the colour of his eyes and the shape and strength of his legs, whether a lad should be an astronomer or an engraver.

Those physical differences among mankind which divide races and nations--not merely those differences, enormously greater as they are generally, than any physical differences between male and female of the same race, which divide the Jew and the Swede, the Japanese and the Englishman, but even those subtle physical differences which divide closely allied races such as the English and German--often appear to be allied with certain subtle differences in intellectual aptitudes.

Yet even with regard to these differences, it is almost impossible to determine scientifically in how far they are the result of national traditions, environment, and education, and in how far the result of real differences in organic conformation.

(In thinking of physical sex differences, the civilised man of modern times has always to guard himself against being unconsciously misled by the very exaggerated external sex differences which our unnatural method of sex clothing and dressing the hair produces.