“The pleasure-prone personality has a low capacity and tolerance for violent-aggressive behaviors. Conversely, the violence and aggression prone personality has a low capacity and tolerance for pleasure and for sensuous behaviors. As one goes up, the other goes down.”

Source: Understanding International Conflicts: An Introduction to Theory and History (6th ed., 2006), Chapter 3, Balance of Power and World War I, p. 61.

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"Body Pleasure and the Origins of Violence" (1975)

Man in the Modern Age (1933)
Context: The masses are our masters; and for every one who looks facts in the face his existence has become dependent on them, so that the thought of them must control his doings, his cares, and his duties.
Even an articulated mass always tends to become unspiritual and inhuman. It is life without existence, superstitions without faith. It may stamp all flat; it is disinclined to tolerate independence and greatness, but prone to constrain people to become as automatic as ants.<!-- p. 43

Wojnar, Anna (April 2011): O mózgu interdyscyplinarnie. Alma Mater”, 134–135, pp. 24–25 (in Polish).

Hillary Clinton (1975) State of Arkansas V. Thomas Alfred Taylor affidavit as quoted in Did Hillary Clinton betray a criminal client? http://www.cnn.com/2014/07/01/opinion/callan-hillary-clinton/ CNN (2014/07/01). <br class="br">1970s

Source: The Other Side of the Story

In reference to Sadism and Masochism, as quoted in Who's Who in Contemporary Gay & Lesbian History: From World War II to the Present Day (2001) by Robert Aldrich and Gary Wotherspoon

On Human Nature (1978), Ch.5 Aggression