370 
SEXUAL selection: man. 
Paet IL 
— tliat is, the preservation of the most approved indivi- 
duals — without any wish or expectation of such a result 
on the part of the breeder. So again, if two careful 
breeders rear during many years animals of the same 
family, and do not compare them together or with 
a common standard, the animals are found after a 
time to have become to the surprise of their owners 
slightly different/^ Each breeder has impressed, as 
Von Nathusius well expresses it, the character of his 
own mind — his own taste and judgment — on his 
animals. What reason, then, can be assigned why 
similar results should not follow from the long-con- 
tinued selection of the most admired women by those 
men of each tribe, who were able to rear to maturity 
the greater number of children? This would be un- 
conscious selection, for an effect would be produced, 
independently of any wish or expectation on the part 
of the men who preferred certain women to others. 
Let us suppose the members of a tribe, in which 
some form of marriage was practised, to spread over an 
unoccupied continent ; they would soon split up into* 
distinct hordes, which wmuld be separated from each 
other by various barriers, and stilt more effectually by 
the incessant wars between all barbarous nations. The 
hordes would thus be exposed to slightly different con- 
ditions and habits of life, and would sooner or later 
come to differ in some small degree. As soon as this 
occurred, each isolated tribe would form for itself a 
slightly different standard of beauty ; and then un- 
16 ^ Variation of Animals and Plants under Domestication,’” 
vol. ii. p. 210-217. 
An ingenious writer argues, from a comjiarison of the pictures of 
Eapliael, Eubens, and modern French artists, that the idea of beauty is 
not absolutely the same even throughout EurojDe : see the ‘ Lives of 
Haydn and Mozart/ by M. Bombet, English translat. p. 278. 
