538 LAWS OF MULTIPLICATION. 



relative approach towards equilibrium between the number 

 of new individuals produced and the number which survive 

 and propagate. 



The final result to be observed is that in Man, all these 

 equilibrations between constitution and conditions, between 

 the structure of society and the nature of its members, 

 between fertility and mortality, advance simultaneously 

 towards a common climax. In approaching an equilibrium 

 between his nature and the ever-varying circumstances of his 

 inorganic environment, and in approaching an equilibrium 

 between his nature and all the requirements of the social 

 state, Man is at the same time approaching that lowest limit 

 of fertility at which the equilibrium of population is main- 

 tained by the addition of as many infants as there are sub- 

 tractions by death in old age. But in a universe of which all 

 parts are in motion and every part is consequently subject to 

 change of conditions, neither this equilibrium nor any other 

 equilibrium can become complete. 



THE END. 



