CONTROLLED NATURAL SELECTION 
AND VALUE MARKING 
CHAPTER I 
THE THEORY 
BEForE statement of the Theory is given, 
certain facts of Nature must be called atten- 
tion to, upon which the Theory may be said 
to rest. 
Firstly, the individuals of a species are, in 
very many cases, not all of equal value. In 
the vast majority of sexually differentiated 
species, males are less valuable than females, 
for these reasons:—the soma carrying the 
female germ cells, the female, does not dis- 
charge its germ cells until they are fertilised, 
and often partially developed into embryos. 
Thus the female often is equivalent to male 
and female, and when about to give birth to 
young, to male and female in the form of 
young, individuals of the next generation. 
A 
