“Suppose, now, there is such a thing as an all-round inferior race. Is that any reason why we should propose to preserve it for ever…? Whether there is a race so inferior I do not know, but certainly there is no race so superior as to be trusted with human charges. The true answer to Aristotle’s plea for slavery, that there are “natural slaves,” lies in the fact that there are no “natural” masters… The true objection to slavery is not that it is unjust to the inferior but that it corrupts the superior. There is only one sane and logical thing to be done with a really inferior race, and that is to exterminate it. Now there are various ways of exterminating a race, and most of them are cruel. You may end it with fire and sword after the old Hebrew fashion; you may enslave it and work it to death, as the Spaniards did the Caribs; you may set it boundaries and then poison it slowly with deleterious commodities, as the Americans do with most of their Indians; you may incite it to wear clothing to which it is not accustomed and to live under new and strange conditions that will expose it to infectious diseases to which you yourselves are immune, as the missionaries do the Polynesians; you may resort to honest simple murder, as we English did with the Tasmanians; or you can maintain such conditions as conduce to “race suicide,” as the British administration does in Fiji. Suppose, then, for a moment, that there is an all-round inferior race… If any of the race did, after all, prove to be fit to survive, they would survive—they would be picked out with a sure and automatic justice from the over-ready condemnation of all their kind. Is there, however, an all-round inferior race in the world? Even the Australian black-fellow is, perhaps, not quite so entirely eligible for extinction as a good, wholesome, horse-racing, sheep-farming Australian white may think. These queer little races, the black-fellows, the Pigmies, the Bushmen, may have their little gifts, a greater keenness, a greater fineness of this sense or that, a quaintness of the imagination or what not, that may serve as their little unique addition to the totality of our Utopian civilisation. We are supposing that every individual alive on earth is alive in Utopia, and so all the surviving “black-fellows” are there. Every one of them in Utopia has had what none have had on earth, a fair education and fair treatment, justice, and opportunity…Some may be even prosperous and admired, may have married women of their own or some other race, and so may be transmitting that distinctive thin thread of excellence, to take its due place in the great synthesis of the future.”

"Have You Learned The Most Important Lesson Of All?" http://www.thehypertexts.com/Essays%20Articles%20Reviews%20Prose/Elie_Wiesel_Essay_Have_You_Learned_The_Most_Important_Lesson_Of_All.htm, published in Parade Magazine (24 May 1992)

1966, Interview with Alex Haley

Reply in the Senate to William H. Seward (29 February 1860), Senate Chamber, U.S. Capitol. As quoted in The Papers of Jefferson Davis, Volume 6, pp. 277–84. Transcribed from the Congressional Globe, 36th Congress, 1st Session, pp. 916–18.
1860s

Liberty.
Source: The Works of Robert G. Ingersoll, Vol. IX

page ?
88 Precepts

Anticipations of the Reaction of Mechanical and Scientific Progress Upon Human Life and Thought http://books.google.com/books?id=OTP8dQHO57UC (1901), The Faith, Morals, and Public Policy of The New Republic, pp. 340–343
Context: Money and credit are as much human contrivances as bicycles, and as liable to expansion and modification as any other sort of prevalent but imperfect machine.
And how will the new republic treat the inferior races? How will it deal with the black? how will it deal with the yellow man? how will it tackle that alleged termite in the civilized woodwork, the Jew? Certainly not as races at all. It will aim to establish, and it will at last, though probably only after a second century has passed, establish a world state with a common language and a common rule. All over the world its roads, its standards, its laws, and its apparatus of control will run. It will, I have said, make the multiplication of those who fall behind a certain standard of social efficiency unpleasant and difficult… The Jew will probably lose much of his particularism, intermarry with Gentiles, and cease to be a physically distinct element in human affairs in a century or so. But much of his moral tradition will, I hope, never die. … And for the rest, those swarms of black, and brown, and dirty-white, and yellow people, who do not come into the new needs of efficiency?
Well, the world is a world, not a charitable institution, and I take it they will have to go. The whole tenor and meaning of the world, as I see it, is that they have to go. So far as they fail to develop sane, vigorous, and distinctive personalities for the great world of the future, it is their portion to die out and disappear.
The world has a greater purpose than happiness; our lives are to serve God's purpose, and that purpose aims not at man as an end, but works through him to greater issues.

1850s, Speech at Chicago (1858)

1940s–present, Introduction to Nietzsche's The Antichrist

Preface; Previous Attempts Miss the Point.
1930s, On the Rocks (1933)
Context: The extermination of what the exterminators call inferior races is as old as history. "Stone dead hath no fellow" said Cromwell when he tried to exterminate the Irish. "The only good nigger is a dead nigger" say the Americans of the Ku-Klux temperament. "Hates any man the thing he would not kill?" said Shylock naively. But we white men, as we absurdly call ourselves in spite of the testimony of our looking glasses, regard all differently colored folk as inferior species. Ladies and gentlemen class rebellious laborers with vermin. The Dominicans, the watchdogs of God, regarded the Albigenses as the enemies of God, just as Torquemada regarded the Jews as the murderers of God. All that is an old story: what we are confronted with now is a growing perception that if we desire a certain type of civilization and culture we must exterminate the sort of people who do not fit into it. There is a difference between the shooting at sight of aboriginal natives in the back blocks of Australia and the massacres of aristocrats in the terror which followed the foreign attacks on the French Revolution. The Australian gunman pots the aboriginal natives to satisfy his personal antipathy to a black man with uncut hair. But nobody in the French Republic had this feeling about Lavoisier, nor can any German Nazi have felt that way about Einstein. Yet Lavoisier was guillotined; and Einstein has had to fly for his life from Germany. It was silly to say that the Republic had no use for chemists; and no Nazi has stultified his party to the extent of saying that the new National Socialist Fascist State in Germany has no use for mathematician-physicists. The proposition is that aristocrats (Lavoisier's class) and Jews (Einstein's race) are unfit to enjoy the privilege of living in a modern society founded on definite principles of social welfare as distinguished from the old promiscuous aggregations crudely policed by chiefs who had no notion of social criticism and no time to invent it.