He delights in the use of his faculties for their own sake；sometimes using them nobly， whether with the abandon of the great Greek burst of life， or under the control of a deliberate and steadfast striving towards important ends； sometimes ignobly， as in the case of a morbid development of the taste for drink.The religious， the moral， the intellectual and the artistic faculties on which the progress of industry depends， are not acquired solely for the sake of the things that may be got by them； but are developed by exercise for the sake of the pleasure and the happiness which they themselves bring： and， in the same way， that greater factor of economic prosperity， the organization of a well-ordered state， is the product of an infinite variety of motives； many of which have no direct connection with the pursuit of national wealth.(4*)No doubt it is true that physical peculiarities acquired by the parents during their life-time are seldom if ever transmitted to their offspring.But no conclusive case seems to have been made out for the assertion that the children of those who have led healthy lives， physically and morally， will not be born with a firmer fibre than they would have been had the same parents grown up under unwholesome influences which had enfeebled the fibre of their minds and their bodies.And it is certain that in the former case the children are likely after birth to be better nourished， and better trained； to acquire more wholesome instincts； and to have more of that regard for others and that self-respect， which are the mainsprings of human progress， than in the latter case.(5*)It is needful then diligently to inquire whether the present industrial organization might not with advantage be so modified as to increase the opportunities， which the lower grades of industry have for using latent mental faculties， for deriving pleasure from their use， and for strengthening them by use； since the argument that if such a change had been beneficial， it would have been already brought about by the struggle for survival， must be rejected as invalid.Man's prerogative extends to a limited but effective control over natural development by forecasting the future and preparing the way for the next step.
Thus progress may be hastened by thought and work； by the application of the principles of Eugenics to the replenishment of the race from its higher rather than its lower strains， and by the appropriate education of the faculties of either sex： but however hastened it must be gradual and relatively slow.It must be slow relatively to man's growing command over technique and the forces of nature； a command which is making ever growing calls for courage and caution， for resource and steadfastness， for penetrating insight and for breadth of view.And it must be very much too slow to keep pace with the rapid inflow of proposals for the prompt reorganization of society on a new basis.In fact our new command over nature， while opening the door to much larger schemes for industrial organization than were physically possible even a short time ago， places greater responsibilities on those who would advocate new developments of social and industrial structure.For though institutions may be changed rapidly； yet if they are to endure they must be appropriate to man： they cannot retain their stability if they change very much faster than he does.Thus progress itself increases the urgency of the warning that in the economic world， Natura non facit saltum.(6*)Progress must be slow； but even from the merely material point of view it is to be remembered that changes， which add only a little to the immediate efficiency of production， may be worth having if they make mankind ready and fit for an organization， which will be more effective in the production of wealth and more equal in its distribution； and that every system， which allows the higher faculties of the lower grades of industry to go to waste， is open to grave suspicion.
NOTES：
1.See a brilliant paper by H鋍kel on Arbeitsteilung in Menschen-und Tierleben and Sch鋐fle's Bau und Leben des sozialen K鰎pers.
2.Like all other doctrines of the same class， this requires to be interpreted in the light of the fact that the effective demand of a purchaser depends on his means， as well as on his wants： a small want on the part of a rich man often has more effective force in controlling the business arrangements of the world than a great want on the part of a poor man.
3.See above I， IV， section 6； and below Appendix B， sections 3and 6.
4.Man with his many motives， as he may set himself deliberately to encourage the growth of one peculiarity， may equally set himself to check the growth of another： the slowness of progress during the Middle Ages was partly due to a deliberate detestation of learning.
5.See Note XI in the Mathematical Appendix.Considerations of this class have little application to the development of mere animals， such as mice； and none at all to that of peas and other vegetables.And therefore the marvellous arithmetical results which have been established， provisionally at all events， in regard to heredity in such cases， have very little bearing on the full problems of inheritance with which students of social science are concerned： and some negative utterances on this subject by eminent Mendelians seem to lack due reserve.Excellent remarks on the subject will be found in Prof Pigou's Wealth and Warfare， Part I， ch.IV.
6.Compare Appendix A， section 16.
