But into this I need not go; and I have only one thing to say in conclusion. I have spoken of the enormous results of what we call progress and civilisation. That they are in one sense enormous is, I suppose, undeniable. That the power which we generally describe as the command of man over nature has been immensely increased is too palpable a fact to be denied; that there has been a corresponding change in many political and social respects is a fact which I only mention without seeking to say how far it has been in all respects a change for the better. Further, I urge that this change, whatever it is, has not been due to a change in the individual constitution, but to a change in the social factor. And, this being so, I simply suggest that, considering how vast is the total change thus effected, we may reasonably hope, or, at the very least, we may reasonably endeavour to justify the hope, that a change of great magnitude may be brought about in those directions where we all have to regret the survival or even the development of so much that is melancholy: of regeneration going on alongside of amelioration. I think that the doctrine of heredity is sometimes interpreted in such a way as to suggest the hopelessness or at least the extreme difficulty of introducing any sensible improvement within any limited time; and what I have tried to urge is that, if properly understood, it does not in the least degree tend to justify such forebodings, or to imply that we are to abandon ourselves to a demoralising fatalism. PUNISHMENT.