“When one says, for example, that superiority and inferiority is a formation to be found in every human association, though the proposition certainly involves very profound insight into the essence of human nature and human relationship, yet the assertion is so general that it affords little knowledge of particular societary formations. In order to reach such particular knowledge we must study separate types of superiority and inferiority, and we must master the special features of their formation, which in proportion to their definiteness of course lose generality of application.”

Statement quoted in the Boston Globe (25 October 1977)
Context: Even today, we are still accused of racism. This is a mistake. We know that all interracial groups in South Africa are relationships in which whites are superior, blacks inferior. So as a prelude whites must be made to realize that they are only human, not superior. Same with blacks. They must be made to realize that they are also human, not inferior.

Source: The Wisdom of W.E.B. Du Bois (2003), p. 10

Chpt.1, p. 1
Principles of Geology (1832), Vol. 1

Lecture IX : On the Conduct of the Understanding
Elementary Sketches of Moral Philosophy (1849)

The Divine Commodity: Discovering A Faith Beyond Consumer Christianity (2009, Zondervan)

is nothing but another and most convenient fairy-tale. Primitive tribes has more detailed classifications of animals and plant than contemporary scientific zoology and botany, they know remedies whose effectiveness astounds physicians (while the pharmaceutical industry already smells here a new source of income), they have means of influencing their fellow men which science for a long time regarded as non-existent (voodoo), they solve difficult problems in ways which are still not quite understood (building of the pyramids; Polynesian travels), there existed a highly developed and internationally known astronomy in the old Stone Age, this astronomy was factually adequate as well as emotionally satisfying, it solved both physical and social problems (one cannot say the same about modern astronomy) and it was tested in very simple and ingenious ways (stone observatories in England and in the South Pacific; astronomical schools in Polynesia - for a more details treatment an references concerning all these assertions cf. my Einfuhrung in die Naturphilosophie). There was the domestication of animals, the invention of rotating agriculture, new types of plants were bred and kept pure by careful avoidance of cross fertilization, we have chemical inventions, we have a most amazing art that can compare with the best achievement of the present. True, there were no collective excursions to the moon, but single individuals, disregarding great dangers to their soul and their sanity, rose from sphere to sphere to sphere until they finally faced God himself in all His splendor while others changed into animals and back into humans again. At all times man approached his surroundings with wide open senses and a fertile intelligence, at all times he made incredible discoveries, at all times we can learn from his ideas.
Pg. 306-307
Against Method (1975)

"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)

War (1816)

Four Dissertations (1757)