462 Natural Science and Morality . [July , 
of stability within itself which is the very condition for the 
existence of self-evolved systems. It will be, of course, 
understood here that one of the most important elements in 
the pursuit of individual happiness, is the cultivation of the 
esteem of one’s fellow men by the performance of kind offices, 
since friendship and sociability are among the mainsprings 
of individual happiness. 
