86 ANALYSIS OF THE FOUR PRINCIPLES. 



4. The Filio-parental Form of Selection and Election, and Family 

 Partition. 



Filio-parental selection is due to the dependence of survival on the 

 coordination between the inherited needs, powers, and instincts of the 

 young by which they are related to their parents and the inherited 

 adaptations, powers, and instincts of the parents by which they are 

 related to the young. In my paper on Intensive Segregation I referred 

 to the necessity for coordination between the size of the child's head 

 and the size of the pelvis in the mother. 



In Science for December 24, 1897, page 942, G. A. Reid, of Southsea, 

 England,- calls attention to the increasing difficulty of childbirth in 

 civilized women, resulting from the regressive selection occasioned by 

 the skillful appliances of modern science. He says: "Indeed the 

 recent advance of obstetric science has enabled so many of the other- 

 wise unfit to survive among us for some generations past that now 

 numerous women are quite incapable of parturition without instru- 

 mental aid." In a note he adds: "It is not possible that the saving 

 of so many narrow-hipped women and big-headed children can have 

 left the race unaffected." 



Filio-parental election is due to the necessity for coordination be- 

 tween the acquired habits of the young and the habits, instincts, and 

 endowments of the parents in order to gain success and influence. 



The term ' ' family isolation ' ' may be needed in describing the 

 usual relationship of mates in certain species ; but with mammals it 

 has been found that in-and-in breeding, continued through many 

 generations, tends to degeneration, and, therefore, to extinction. 



Family partition arises in so far as the separation of families leads 

 to the formation of separate habits and acquired characters. It is 

 doubtful whether the term "filio-parental partition" is needed, as 

 the term ' ' family partition ' ' seems to be more appropriate. 



5. The Forms of the Dominational Method of Influence. 



Producing intensified divergence in the habits of groups : 



Dominational election. 

 Producing intensification of racial groups : 

 Dominational selection. 



Sustentational domination. 

 Protectional domination. 

 Nidificational domination. 

 Mating domination; 

 Prepotential domination. 



The dominational method of influence does not depend on superior 

 adjustments to the environment, but is due to the power to outdo, 



