“Through the means just specified, aided perhaps by others as yet undiscovered, man has been raised to his present state. But since he attained to the rank of manhood, he has diverged into distinct races, or as they may be more appropriately called sub-species. Some of these, for instance the Negro and European, are so distinct that, if specimens had been brought to a naturalist without any further information, they would undoubtedly have been considered by him as good and true species. Nevertheless all the races agree in so many unimportant details of structure and in so many mental peculiarities, that these can be accounted for only through inheritance from a common progenitor; and a progenitor thus characterised would probably have deserved to rank as man.”
volume II, chapter XXI: "General Summary and Conclusion", page 388 http://darwin-online.org.uk/content/frameset?pageseq=405&itemID=F937.2&viewtype=image
The Descent of Man (1871)
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Charles Darwin 161
British naturalist, author of "On the origin of species, by… 1809–1882Related quotes

Source: Look Away!: A History of the Confederate States of America (2002), p. 20

Time in History: Views of Time from Prehistory to the Present Day (1988), p. 21
Source: Dictionary of Burning Words of Brilliant Writers (1895), p. 585.

Pt. I, Ch. 2 : The Evanescence of Evil, concluding paragraph
Social Statics (1851)
Context: Man needed one moral constitution to fit him for his original state; he needs another to fit him for his present state; and he has been, is, and will long continue to be, in process of adaptation. And the belief in human perfectibility merely amounts to the belief that, in virtue of this process, man will eventually become completely suited to his mode of life.
Progress, therefore, is not an accident, but a necessity. Instead of civilization being artificial, it is part of nature; all of a piece with the development of the embryo or the unfolding of a flower. The modifications mankind have undergone, and are still undergoing, result from a law underlying the whole organic creation; and provided the human race continues, and the constitution of things remains the same, those modifications must end in completeness.

Darwinism: The Imperialism of Biology?, Expelled: No Intelligence Allowed, 31 October 2007, 2008-02-26 http://expelledthemovie.com/blog/page/3/,