“The tendency was to sell families as units, if for no other reason [than] to keep the slaves contented. The gangs in transit were usually a cheerful lot, though the presence of a number of the more vicious type sometimes made it necessary for them all to go in chains. At the other extreme, when the Central of Georgia railroad company in 1858 equipped a Negro sleeping car to assist in the slave trade it set a standard not always maintained in a later generation. When on the block, the slave was as likely to hinder as to help in his sale. Some, out of a vain conceit in bringing a high price, would boast of their physical prowess, in which case an unwary purchaser would likely be cheated. Others would malinger, because of a grudge against owners or traders or in order to bring a low price and be put at less tiring labor. Dealers, also, adopted the tricks of horse traders to make their merchants more attractive -- the greasiest Negro was generally considered the healthiest.”

The Making of America (1986)

2010s, Bullwhip Feudalism (2018)

Source: The Wisdom of W.E.B. Du Bois (2003), p. 104

The Groundings with my Brothers https://archive.org/details/TheGroundingsWithMyBrothers (1969)
Context: We were told that violence in itself is evil, and that, whatever the cause, it is unjustified morally. By what standard of morality can the violence used by a slave to break his chains be considered the same as the violence of a slave master? By what standards can we equate the violence of blacks who have been oppressed, suppressed, depressed and repressed for four centuries with the violence of white fascists. Violence aimed at the recovery of human dignity and at equality cannot be judged by the same yardstick as violence aimed at maintenance of discrimination and oppression.

St. 1
"Stanzas on Freedom" (1843)
Context: If there breathe on earth a slave,
Are ye truly free and brave?
If ye do not feel the chain,
When it works a brother's pain,
Are ye not base slaves indeed,
Slaves unworthy to be freed?

Their Morals and Ours (1938)
Context: (On the American Civil War) "History has different yardsticks for the cruelty of the Northerners and the cruelty of the Southerners in the Civil War. A slave-owner who through cunning and violence shackles a slave in chains, and a slave who through cunning or violence breaks the chains – let not the contemptible eunuchs tell us that they are equals before a court of morality!"

Source: Writings, Politics of Guilt and Pity (1978), pp. 3-4

Part 3, Section 3
Part 3, Section 3
Source: A Treatise of Human Nature (1739-40), Book 2: Of the passions
Context: We speak not strictly and philosophically when we talk of the combat of passion and of reason. Reason is, and ought only to be the slave of the passions, and can never pretend to any other office than to serve and obey them.
Context: What may at first occur on this head, is, that as nothing can be contrary to truth or reason, except what has a reference to it, and as the judgments of our understanding only have this reference, it must follow, that passions can be contrary to reason only so far as they are accompany'd with some judgment or opinion. According to this principle, which is so obvious and natural, `tis only in two senses, that any affection can be call'd unreasonable. First, When a passion, such as hope or fear, grief or joy, despair or security, is founded on the supposition or the existence of objects, which really do not exist. Secondly, When in exerting any passion in action, we chuse means insufficient for the design'd end, and deceive ourselves in our judgment of causes and effects. Where a passion is neither founded on false suppositions, nor chuses means insufficient for the end, the understanding can neither justify nor condemn it. `Tis not contrary to reason to prefer the destruction of the whole world to the scratching of my finger. `Tis not contrary to reason for me to chuse my total ruin, to prevent the least uneasiness of an Indian or person wholly unknown to me. `Tis as little contrary to reason to prefer even my own acknowledge'd lesser good to my greater, and have a more ardent affection for the former than the latter. A trivial good may, from certain circumstances, produce a desire superior to what arises from the greatest and most valuable enjoyment; nor is there any thing more extraordinary in this, than in mechanics to see one pound weight raise up a hundred by the advantage of its situation. In short, a passion must be accompany'd with some false judgment. in order to its being unreasonable; and even then `tis not the passion, properly speaking, which is unreasonable, but the judgment.

quoted from Lal, K. S. (1999). Theory and practice of Muslim state in India. New Delhi: Aditya Prakashan. Chapter 4