SELECTION \ON MAN. 319 
America, and in Brazil; the Tasmanian, Australian, 
and New Zealander in the southern hemisphere, die 
out, not from any one special cause, but from the 
inevitable effects of an unequal mental and physical 
struggle. The intellectual and moral, as well as the 
physical, qualities of the European are superior; the 
same powers and capacities which have made him 
rise in a few centuries from the condition of the 
wandering savage with a scanty and stationary popu- 
lation, to his present state of culture and advancement, 
with a greater average longevity, a greater average 
strength, and a capacity of more rapid increase,— 
enable him when in contact with the savage man, to 
conquer in the struggle for existence, and to increase at 
his expense, just as the better adapted, increase at the 
expense of the less adapted varieties in the animal and 
vegetable kingdoms,—just as the weeds of Europe 
overrun North America and Australia, extinguishing 
native productions by the inherent vigour of their 
organization, and by their greater capacity for existence 
and multiplication. 
The Origin of the Races of Man. 
If these views are correct; if in proportion as 
man’s social, moral, and intellectual faculties became 
developed, his physical structure would cease to be 
affected by the operation of ‘natural selection,” we 
have a most important clue to the origin of. races. 
' For it will follow, that those great modifications of 
structure and of external form, which resulted in the 
