54 THE FOUR SEGREGATIVE PRINCIPLES. 
nothing in determining selection unless they have power to live and 
reproduce. The indiscriminate form of survival I call ‘‘indiscrimi- 
nate elimination.’’ It is often the chief principle by which diver- 
gence is initiated in two or more isolated masses of a species. If 
indiscriminate destruction reduces each group to but one or two indi- 
viduals capable of propagating the race, divergence immediately 
arises in regard to one or more points of character. 
Partition, acting on acquired characters, produces habitudinal de- 
marcation with inztral habitudinal segregation. 
Election, acting on acquired characters, produces intensified habt- 
tudinal segregation. 
Isolation, acting on inherited characters, produces racial demarca- 
tion with znitral racial segregation. 
Selection, acting on inherited characters, produces intensified racial 
segregation. 
Partition and election acting together produce cumulative habitu- 
dinal segregation. 
Isolation and selection acting together produce cumulative racial 
segregation. 
Partition and isolation acting together produce typal demarcation 
with initial segregation, both habitudinal and racial. 
Election and selection acting together produce intensified segrega- 
tion, both habitudinal and racial. 
The four principles acting together produce allogamic evolution, 
both habitudinal and racial, through the segregation of types. 
4. Objections that may be Raised to the Terms Used. 
It may be thought that such terms as ‘‘partition”’ and ‘‘election”’ 
are not needed in the exposition of the process of evolution; that the 
whole process may be considered as due to selection, and, if influences 
not recognized by Darwin are discovered, they should be designated as 
forms of selection. My suggestion is that a definite attempt to con- 
struct a nomenclature, enabling one to set forth the evolution of ac- 
quired characters and the influence of the same on the evolution of 
inherited characters, will show the investigator that great gain in 
brevity and clearness may be secured by the use of separate words 
to designate the principles in habitudinal segregation that corre- 
spond to isolation and selection in racial segregation. But, evenif the 
need of such terms is recognized, objection may be raised against the 
use of the term ‘‘election,’’ on the ground that it properly signifies 
the elevation of an individual to a position of influence by his winning 
the conscious choice of rational beings, while in the nomenclature 
