“Women are stripped to the skin in the presence of leering, white-skinned, black-hearted brutes and lashed into insensibility and strangled to death from the limbs of trees. A girl child of fifteen years was lynched recently by these brutal bullies. Where has justice fled? The eloquence of Wendell Phillips is silent now. John Brown’s body lies moldering in the grave. But will his spirit lie there moldering, too? Brutes, inhuman monsters—you heartless brutes—you whom nature forms by molding you in it, deceive not yourselves by thinking that another John Brown will not arise.”

Source: Following the Equator (1897), Ch. XLI

Source: On the Duty of Civil Disobedience

Source: Bellum Catilinae (c. 44 BC), Chapter I

As quoted in El Punt (28 January 2012). "La teva cara em sona" http://www.elpuntavui.cat/noticia/article/5-cultura/19-cultura/500466-la-teva-cara-em-sona.html

Source: Black Theology and Black Power (1969), p. 151

Letter to Abigail Adams (29 October 1775), published Letters of John Adams, Addressed to His Wife, Vol. 1 (1841), ed. Charles Francis Adams, p. 72
1770s
Context: Human nature with all its infirmities and depravation is still capable of great things. It is capable of attaining to degrees of wisdom and goodness, which we have reason to believe, appear as respectable in the estimation of superior intelligences. Education makes a greater difference between man and man, than nature has made between man and brute. The virtues and powers to which men may be trained, by early education and constant discipline, are truly sublime and astonishing. Newton and Locke are examples of the deep sagacity which may be acquired by long habits of thinking and study.

Tweet https://twitter.com/jk_rowling/status/678888094339366914?lang=en quoted in " J.K. Rowling angry about black Hermione complaints https://www.cnn.com/2016/06/06/entertainment/jk-rowling-hermione-cursed-child/index.html" by Lisa Respers France, CNN (June 6, 2016)
2010s

Vol. I, Ch. 10, Section 7, pg. 329.
Das Kapital (Buch I) (1867)
Source: Das Kapital/Das kommunistische Manifest
Context: In the United States of North America, every independent movement of the workers was paralysed so long as slavery disfigured a part of the Republic. Labour cannot emancipate itself in the white skin where in the black it is branded.