SELECTION ON MAN. 313 
fellows; the smaller development of the combative and 
destructive propensities; self-restraint in present appe- 
tites ; and that intelligent foresight which prepares for 
the future, are all qualities, that- from their earliest 
appearance must have been for the benefit of each 
community, and would, therefore, have become the 
subjects of “ natural selection.” For it is evident 
that such qualities would be for the well-being of 
man; would guard him against external enemies, 
against internal dissensions, and against the effects of 
inclement seasons and impending famine, more surely 
than could any merely physical modification. Tribes 
in which such mental and moral qualities were pre- 
dominant, would therefore have an advantage in the 
struggle for existence over other tribes in which they 
were less developed, would live and maintain their 
numbers, while the others would decrease and finally 
succumb. : 
Again, when any slow changes of physical geogra- 
phy, or of climate, make it necessary for an animal 
to alter its food, its clothing, or its weapons, it can 
only do so by the occurrence of a corresponding 
change in its own bodily structure and internal or- 
ganization. Ifa larger or more powerful beast is to 
be captured and devoured, as when a carnivorous ani- 
mal which has hitherto preyed on antelopes is obliged 
from their decreasing numbers to attack buffaloes, it 
is only the strongest who can hold,—those with most 
- powerful claws, and formidable canine teeth, that can 
struggle with and overcome such an animal. Natural 
