When we have got rid of the tendency to think that certain modes of activity are necessarily pleasurable because they give us pleasure, and that other modes which do not please us are necessarily unpleasing; we shall see that the remolding of human nature into fitness for the requirements of social life, must eventually make all needful activities pleasurable, while it makes displeasurable all activities at variance with these requirements. When we have come fully to recognize the truth that there is nothing intrinsically more gratifying in the efforts by which wild animals are caught, than in the efforts expended in rearing plants, and that the combined actions of muscles and senses in rowing a boat are not by their essential natures more productive of agreeable feeling than those gone through in reaping corn, but that everything depends on the co-operating emotions, which at present are more in accordance with the one than with the other; we shall infer that along with decrease of those emotions for which the social state affords little or no scope, and increase of those which it persistently exercises, the things now done with dislike from a sense of obligation will be done with immediate liking, and the things desisted from as a matter of duty will be desisted from because they are repugnant. This conclusion, alien to popular beliefs and in ethical speculation habitually ignored, or at most recognized but partially and occasionally, will be thought by the majority so improbable that I must give further justification of it: enforcing the _à priori_ argument by an _à posteriori_ one. Small as is the attention given to the fact, yet is the fact conspicuous that the corollary above drawn from the doctrine of Evolution at large, coincides with the corollary which past and present changes in human nature force upon us. The leading contrasts of character between savage and civilized, are just those contrasts to be expected from the process of adaptation. The life of the primitive man is passed mainly in the pursuit of beasts, birds and fish, which yields him a gratifying excitement; but though to the civilized man the chase gives gratification, this is neither so persistent nor so general. There are among us keen sportsmen, but there are many to whom shooting and fishing soon become wearisome, and there are not a few to whom they are altogether indifferent or even distasteful.