“If we would indicate an idea which, throughout the whole course of history, has ever more and more widely extended its empire, or which, more than any other, testifies to the much-contested and still more decidedly misunderstood perfectibility of the whole human race, it is that of establishing our common humanity — of striving to remove the barriers which prejudice and limited views of every kind have erected among men, and to treat all mankind, without reference to religion, nation, or color, as one fraternity, one great community, fitted for the attainment of one object, the unrestrained development of the physical powers.”

Day of Affirmation Address (1966)
Context: The help and the leadership of South Africa or of the United States cannot be accepted if we, within our own country or in our relationships with others, deny individual integrity, human dignity, and the common humanity of man. If we would lead outside our borders, if we would help those who need our assistance, if we would meet our responsibilities to mankind, we must first, all of us, demolish the borders which history has erected between men within our own nations — barriers of race and religion, social class and ignorance.
Our answer is the world's hope; it is to rely on youth. The cruelties and the obstacles of this swiftly changing planet will not yield to obsolete dogmas and outworn slogans. It cannot be moved by those who cling to a present which is already dying, who prefer the illusion of security to the excitement and danger which comes with even the most peaceful progress. This world demands the qualities of youth: not a time of life but a state of mind, a temper of the will, a quality of the imagination, a predominance of courage over timidity, of the appetite for adventure over the love of ease.

Running on Emptiness: The Pathology of Civilization (2002)

Toward a Higher System of World Law and Justice (1986)

The Railroad Trainman (November 1909)

Introductory
A Treatise on Man and the Development of His Faculties (1842)
Context: It is a remarkable fact in the history of science, that the more extended human knowledge has become, the more limited human power, in that respect, has constantly appeared. This globe, of which man imagines the haughty possessor, becomes, in the eyes of astronomer, merely a grain of dust floating in immensity of space: an earthquake, a tempest, an inundation, may destroy in an instant an entire people, or ruin the labours of twenty ages.... But if each step in the career of science thus gradually diminishes his importance, his pride has a compensation in the greater idea of his intellectual power, by which he has been enabled to perceive those laws which seem to be, by their nature, placed for ever beyond his grasp.

All tyrants, past, present and future, are powerless to bury the truths in these declarations, no matter how extensive their legions, how vast their power and how malignant their evil.
1960s, Emancipation Proclamation Centennial Address (1962)

Declaration of Sentiments, Boston Peace Conference http://fair-use.org/the-liberator/1838/09/28/declaration-of-sentiments-adopted-by-the-peace-convention#p3 (28 September 1838)

1996 Sir Robert Menzies Lecture

Nick Griffin, The BNP: Anti-asylum protest, racist sect or power-winning movement? http://web.archive.org/web/20030605150634/http://www.bnp.org.uk/articles/race_reality.htm