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Cruelty is indifference to suffering, and even pleasure in inflicting it.[according to whom?] Sadism can also be related to this form of action or concept. Cruel ways of inflicting suffering may involve violence, but affirmative violence is not necessary for an act to be cruel. For example, if a person is drowning and begging for help, and another person is able to help, but merely watches with disinterest or perhaps mischievous amusement, that person is being cruel — rather than violent.
George Eliot stated that "cruelty, like every other vice, requires no motive outside of itself; it only requires opportunity."  Bertrand Russell stated that "the infliction of cruelty with a good conscience is a delight to moralists. That is why they invented Hell." Gilbert K. Chesterton stated that "cruelty is, perhaps, the worst kind of sin. Intellectual cruelty is certainly the worst kind of cruelty."
Usage in law
The term cruelty is often used in law and criminology with regard to the treatment of animals, children, spouses, and prisoners. When cruelty to animals is discussed, it often refers to unnecessary suffering. In criminal law, it refers to punishment, torture, victimization, draconian measures, and cruel and unusual punishment. In divorce cases, many jurisdictions permit a cause of action for cruel and inhumane treatment.
In law, cruelty is "the infliction of physical or mental distress, especially when considered a determinant in granting a divorce." 
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In a sexual context, sadomasochism is the giving and/or receiving of pleasure—often sexual—from acts involving the infliction or reception of pain or humiliation. A subset of BDSM, practitioners of sadomasochism usually seek out sexual gratification from these acts, but often seek out other forms of pleasure as well. While the terms sadist and masochist specifically refer to one who either enjoys giving pain (sadist), or one who enjoys receiving pain (masochist), many practitioners of sadomasochism describe themselves as at least somewhat of a switch, or someone who can receive pleasure from either inflicting or receiving pain.
The term comes from Middle English, via the Old French term "crualte", which is based on Latin "crudelitas", from "crudelis".
- Simon Baron-Cohen, The Science of Evil: On Empathy and the Origins of Cruelty, Basic Books, 2011. Reviewed in The Montreal Review
- Susan Sontag, Regarding the Pain of Others, 2003.
- "Cruelty Quotes". BrainyQuote. Retrieved 2013-08-18.
- "Cruelty". Law.com. Retrieved July 12, 2012.
- "Cruelty to animals". Law.com. Retrieved July 12, 2012.
- "Animal Cruelty Law & Legal Definition". USLegal.com. Retrieved July 12, 2012.
- "Cruel and Inhuman Treatment Law & Legal Definition". USLegal.com. Retrieved July 12, 2012.
- The American Heritage® Dictionary of the English Language, Fourth Edition copyright ©2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company.
- "cruelty: definition of cruelty in Oxford dictionary (British & World English)". Oxforddictionaries.com. 2013-08-13. Retrieved 2013-08-18.
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