CHAPTER V. 
THE THEORY COMPARED WITH THE REALITY 
( continued). 
(d) COMPETITION MODIFIED BY CO-OPERATION. 
“None of us liveth to himself, and no man dieth to himself.” 
“As we have many members in one body, so we being many 
are one body. 
“And whether one member suffer, all the members suffer with 
it; or one member be honoured, all the members rejoice with 
it.”—Paul. 
The theory of Natural Selection demands that there should 
be the strictest and the keenest competition between the 
individuals of the same species and the individuals of 
different species, and between species and species. 
“ There must in every case be a struggle for existence ; either 
one individual with another of the same species, or with the indi 
viduals of distinct species.”—(Darwin. Origin of Species, p. go.) 
“ Every species is for itself, and for itself alone : an outcome of 
the always and everywhere fiercely-raging struggle for life.”— 
(Romanes. The Scientific Evidences of Organic Evolution, p. 76.) 
“ As the species of the same genus usually have—though by no 
means invariably—much similarity in habits and constitution, and 
always in structure, the struggle will generally be more severe 
between them, if they come into competition with each other, than 
between the species of distinct genera.”—(Darwin. The Origin of 
Species, p. 5Q.) 
“ The struggle for life—this bellum omnium contra omites—is an 
indisputable and undeniable fact which we here accept in its 
widest relations.”—(Oscar Schmidt. The Doctrine of Descent and 
Darwinism, p. 140.)