common English opinion, due to the natural superiority of Englishmen to frog-eating Frenchmen; and popular government, active invention, and greater average comfort are, or were until lately, in common American opinion, due to the greater "smartness of the Yankee Nation."
Now, just as the politico-economic doctrines which in the beginning of this inquiry we met and disproved, harmonize with the common opinion of men who see capitalists paying wages and competition reducing wages; just as the Malthusian theory harmonized with existing prejudices both of the rich and the poor; so does the explanation of progress as a gradual race improvement harmonize with the vulgar opinion which accounts by race differences for differences in civilization. It has given coherence and a scientific formula to opinions which already prevailed. Its wonderful spread since the time Darwin first startled the world with his "Origin of Species" has not been so much a conquest as an assimilation.
The view which now dominates the world of thought is this: That the struggle for existence, just in proportion as it becomes intense, impels men to new efforts and inventions. That this improvement and capacity for improvement is fixed by hereditary transmission, and extended by the tendency of the best adapted individual, or most improved individual, to survive and propagate among individuals, and of the best adapted, or most improved tribe, nation, or race to survive in the struggle between social aggregates. On this theory the differences between man and the animals, and differences in the relative progress of men, are now explained as confidently, and all but as generally, as a little while ago they were explained upon the theory of special creation and divine interposition.
The practical outcome of this theory is in a sort of
