214 NATURAL SELECTION IX 
pigeon, the production of which are equally beyond its 
undirected power. 
The objections which in this essay I have taken to the 
view that the same law which appears to have sufficed for 
the development of animals has been alone the cause of man’s 
superior physical and mental nature, will, I have no doubt, 
be overruled and explained away. But I venture to think 
they will nevertheless maintain their ground, and that they 
can only be met by the discovery of new facts or new laws, 
of a nature very different from any yet known to us. I can 
only hope that my treatment of the subject, though neces- 
sarily very meagre, has been clear and intelligible; and that 
it may prove suggestive both to the opponents and to the 
upholders of the theory of natural selection. 
