Machiavellianism is, according to the Oxford English Dictionary, "the employment of cunning and duplicity in statecraft or in general conduct", deriving from the Italian Renaissance diplomat and writer Niccolò Machiavelli, who wrote Il Principe (The Prince) and other works. The word has a similar use in modern psychology where it describes one of the dark triad personalities, characterised by a duplicitous interpersonal style associated with cynical beliefs and pragmatic morality. "Machiavellian" as a word became very popular in the late 16th century in English, though "Machiavellianism" itself is first cited by the Oxford English Dictionary from 1626.
Political thought 
In the 16th century, immediately following the publication of the Prince, Machiavellianism was seen as a foreign plague infecting northern European politics, originating in Italy, and having first infected France. It was in this context that the St. Bartholomew's Day massacre of 1572 in Paris came to be seen as a product of Machiavellianism, a view greatly influenced by the Huguenot Innocent Gentillet, who published his Discours contre Machievel in 1576, which was printed in ten editions in three languages over the next four years. Gentillet held, quite wrongly according to Sydney Anglo, that Machiavelli's "books [were] held most dear and precious by our Italian and Italionized [sic] courtiers" in France (in the words of his first English translation), and so (in Anglo's paraphrase) "at the root of France's present degradation, which has culminated not only in the St Bartholemew massacre but the glee of its perverted admirers". In fact there is little trace of Machiavelli in French writings before the massacre, not that politicians telegraph their intentions in writing, until Gentillet's own book, but this concept was seized upon by many contemporaries, and played a crucial part in setting the long-lasting popular concept of Machiavellianism.
The English playwright Christopher Marlowe was an enthusiastic proponent of this view. In The Jew of Malta (1589–90) "Machievel" in person speaks the Prologue, claiming not to be dead, but to have possessed the soul of (the Duke of) Guise, "And, now the Guise is dead, is come from France/ To view this land, and frolic with his friends" (Prologue, lines 3–4) His last play, The Massacre at Paris (1593) takes the massacre, and the following years, as its subject, with the Duke of Guise and Catherine de' Medici both depicted as Machiavellian plotters, bent on evil from the start.
The Anti-Machiavel is an 18th century essay by Frederick the Great, King of Prussia and patron of Voltaire, rebutting The Prince, and Machiavellianism. It was first published in September 1740, a few months after Frederick became king, and is one of many such works.
Machiavellianism is also a term that some social and personality psychologists use to describe a person's tendency to be unemotional, and therefore able to detach themself from conventional morality and hence to deceive and manipulate others. In the 1960s, Richard Christie and Florence L. Geis developed a test for measuring a person's level of Machiavellianism (sometimes referred to as the Machiavelli test). Their Mach - IV test, a twenty-statement personality survey, became the standard self-assessment tool of Machiavellianism. People scoring high on the scale (high Machs) tend to endorse statements such as, "Never tell anyone the real reason you did something unless it is useful to do so," (No. 1) but not ones like, "Most people are basically good and kind" (No. 4), "There is no excuse for lying to someone else," (No. 7) or "Most people who get ahead in the world lead clean, moral lives" (No. 11). Using their scale, Christie and Geis conducted multiple experimental tests that showed that the interpersonal strategies and behavior of "High Machs" and "Low Machs" differ. Their basic results have been widely replicated. Measured on the Mach - IV scale, males are, on average, slightly more Machiavellian than females.
A 1992 review described Machiavellian motivation as related to cold selfishness and pure instrumentality, and those high on the trait were assumed to pursue their motives (e.g. sex, achievement, sociality) in duplicitous ways. More recent research on the motivations of high Machs compared to low Machs found that they gave high priority to money, power, and competition and relatively low priority to community building, self-love, and family concerns. High Machs admitted to focusing on unmitigated achievement and winning at any cost.
Due to their skill at interpersonal manipulation, there has often been an assumption that high Machs possess superior intelligence, or ability to understand other people in social situations. However, research has firmly established that Machiavellianism is unrelated to IQ. Furthermore, studies on emotional intelligence have found that high Machiavellianism actually tends to be associated with low emotional intelligence as assessed by both performance and questionnaire measures. Both empathy and emotion recognition have been shown to have negative correlations with Machiavellianism. Additionally, research has shown that Machiavellianism is unrelated to a more advanced theory of mind, that is, the ability to anticipate what others are thinking in social situations. If high Machs actually are skilled at manipulating others this appears to be unrelated to any special cognitive abilities as such.
Relations with other personality traits 
Machiavellianism is one of the three personality traits referred to as the dark triad, along with narcissism and psychopathy. Some psychologists consider Machiavellianism to be essentially a subclinical form of psychopathy, although recent research suggests that while Machiavellianism and psychopathy overlap, they are distinct personality constructs. Machiavellianism has been found to be negatively correlated with the Agreeableness (r = -.47) and Conscientiousness (r = -.34) dimensions of the Big Five personality model (NEO-PI-R). However, machiavellianism correlates more highly with the Honesty-humility dimension of the six-factor HEXACO model than with any of the Big Five dimensions. Machiavellianism has also been located within the interpersonal circumplex, which consists of the two independent dimensions of agency and communion. Agency refers to motivation to succeed and to individuate the self, whereas communion refers to motivation to merge with others and to support group interests. Machiavellianism lies in the quadrant of the circumplex defined by high agency and low communion. Machiavellianism has been found to lie diagonally opposite from a circumplex construct called self-construal, a tendency to prefer communion over agency. This suggests that people high in machiavellianism do not simply wish to achieve, they wish to do so at the expense of (or at least without regard to) others.
Game theory 
In 2002, the Machiavellianism scale of Christie and Geis was applied by behavioral game theorists Anna Gunnthorsdottir, Kevin McCabe and Vernon L. Smith in their search for explanations for the spread of observed behavior in experimental games, in particular individual choices which do not correspond to assumptions of material self-interest captured by the standard Nash equilibrium prediction. It was found that in a trust game, those with high MACH-IV scores tended to follow homo economicus' equilibrium strategies while those with low MACH-IV scores tended to deviate from the equilibrium, and instead made choices that reflected widely accepted moral standards and social preferences.
See also 
- Jones, Daniel N.; Paulhus, Delroy L. (2009). "Chapter 7. Machiavellianism". In Leary, Mark R. & Hoyle, Rick H. Handbook of Individual Differences in Social Behavior. New York/London: The Guilford Press. pp. 257–273. ISBN 978-1-59385-647-2.
- Anglo, 283 – see also the whole chapter
- Anglo, 286
- Anglo, Chapters 10 and 11; p. 328 etc.
- Project Gutenberg Jew of Malta text
- Christie, R., and F. L. Geis. (1970) "How devious are you? Take the Machiavelli test to find out." Journal of Management in Engineering 15.4: 17.
- Christie, R. & Geis, F. (1970) "Studies in Machiavellianism". NY: Academic Press.
- McIlwain, D. 2003. Bypassing empathy: mapping a Machiavellian theory of mind and sneaky power. In Individual Differences In Theory Of Mind, eds. B. Repacholi and V. Slaughter. Macquarie Monographs in Cognitive Science. NY: Psychology Press. 39-68.
- Gunnthorsdottir, A., McCabe, K. & Smith, V. 2002 "Using the Machiavellianism instrument to predict trustworthiness in a bargaining game". Journal of Economic Psychology 23, 49-66
- Goleman, Daniel (2006). Social Intelligence.
- Paulhus, D.L. & Williams, K.M. 2002. "The Dark Triad of personality: Narcissism, Machiavellianism, and psychopathy". Journal of Research in Personality 36 (2002) 556–563
- Anglo, Sydney. Machiavelli – the First Century: Studies in Enthusiasm, Hostility, and Irrelevance, p. 229, Oxford University Press, 2005, ISBN 0-19-926776-6, ISBN 978-0-19-926776-7 Google Books
- Spielberger, Charles D; Butcher, James N. Advances in Personality Assessment, vol. 9. (Hillsdale, NJ): Lawrence Erlbaum Associates, 1992
- Machiavellianism in The Dictionary of the History of Ideas, online
- Machiavellianism test (MACH-VI) is an interactive version of the MACH-IV test of Machiavellianism.
- Barbara Oakley's Evil Genes page Oakley has written a book Evil Genes, which is mostly about Psychological Machiavellianism