AS APPLIED TO MAN, 357 
of the human foot and hand seem unnecessarily perfect 
for the needs of savage man, in whom they are as 
completely and as humanly developed as in the highest 
races. The structure of the human larynx, giving the 
power of speech and of producing musical. sounds, and 
especially its extreme development in the female sex, 
are shown to be beyond the needs of savages, and from. 
their known habits, impossible to have been acquired 
either by sexual selection, or by survival of the fittest. 
The mind of man offers arguments in the same direc- 
tion, hardly less strong than those derived from his 
bodily structure. A number of his mental faculties 
have no relation to his fellow men, or to his material 
progress. The power of conceiving eternity and in- 
finity, and all those purely abstract notions of form, 
“number, and harmony, which play so large a part in 
the life of civilised races, are entirely outside of the 
world of thought of the savage, and have no influence 
on his individual existence or on that of his tribe. 
They could not, therefore, have been developed by any 
preservation of useful forms of thought; yet we find 
occasional traces of them amidst a low civilization, and 
at a time when they could have had no practical effect 
on the success of the individual, the family, or the, 
race; and the development of a moral sense or con- 
science by similar means is equally inconceivable. 
But, on the other hand, we find that every one of 
these characteristics is necessary for the full develop- 
ment of human nature. The rapid progress of civi- 
lization under favourable conditions, would not be 
