That is what will probably happen. We must expect that the increasing power of women and of the feminine influence will be met by a more emphatic and a more rational assertion of the qualities of men and the masculine spirit in life. It was unjust and unreasonable to subject women to conditions that were primarily made by men and for men. It would be equally unjust and unreasonable to expect men to confine their activities within limits which are more and more becoming adjusted to feminine preferences and feminine capacities. We are now learning to realise that the _tertiary_ physical, and psychic sexual differences--those distinctions which are only found on the average, but on the average are constant[2]--are very profound and very subtle. A man is a man throughout, a woman is a woman throughout, and that difference is manifest in all the energies of body and soul. The modern doctrine of the internal secretions--the hormones which are the intimate stimulants to physical and psychic activity in the organism--makes clear to us one of the deepest and most all-pervading sources of this difference between men and women. The hormonic balance in men and women is unlike; the generative ferments of the ductless glands work to different ends.[3] Masculine qualities and feminine qualities are fundamentally and eternally distinct and incommensurate. Energy, struggle, daring, initiative, originality, and independence, even though sometimes combined with rashness, extravagance, and defect, seem likely to remain qualities in which men--_on the average_, it must be remembered--will be more conspicuous than women. Their manifestation will resist the efforts put forth to constrain them by the feminising influences of life. Such considerations have a real bearing on the problem of Eugenics. As I view that problem, it is first of all concerned, in part with the acquisition of scientific knowledge concerning heredity and the influences which affect heredity; in part with the establishment of sound ideals of the types which the society of the future demands for its great tasks; and in part--perhaps even in chief part--with the acquisition of a sense of personal responsibility. Eugenic legislation is a secondary matter which cannot come at the beginning. It cannot come before our knowledge is firmly based and widely diffused; it cannot come until we are clear as to the ideals which we wish to see embodied in human character and human action; it cannot come until the sense of personal responsibility towards the race is so widely spread throughout the community that its absence is universally felt to be either a crime or a disease.