Machiavellianism is a personality trait defined by a willingness to manipulate others for personal gain, paired with a cynical view of human nature and a low commitment to conventional morality. Psychologists Richard Christie and Florence Geis introduced the concept in 1970 after distilling the political philosophy of Niccolò Machiavelli into a measurable personality dimension. Unlike a clinical diagnosis, Machiavellianism exists on a spectrum: everyone falls somewhere on it, and those who score high tend to see social interactions as transactions where their own needs come first.
Core Features of the Trait
People high in Machiavellianism share a cluster of tendencies that set them apart. They hold a cold, pragmatic worldview, viewing other people as tools or obstacles rather than partners. They are comfortable with deception, often seeing lies as simply a means to an end. And they are strategic thinkers, capable of delaying gratification and planning several moves ahead to secure a larger payoff down the road.
What makes Machiavellianism distinct from ordinary self-interest is the emotional detachment behind it. High scorers don’t just prioritize themselves; they do so with low emotional involvement. They aren’t necessarily hostile or impulsive. Instead, they operate with a calculated coolness, weighing costs and benefits before deciding how much honesty or kindness a situation warrants. They tend to lack strong ideological commitments, treating moral rules as flexible guidelines rather than firm boundaries. Importantly, this doesn’t reflect a cognitive deficit or a psychiatric disorder. These individuals function normally in most respects and often appear socially skilled on the surface.
How Machiavellianism Is Measured
The standard tool is the Mach-IV scale, a 20-item questionnaire developed by Christie and Geis from an original pool of 71 statements drawn from Machiavelli’s writings, particularly The Prince and The Discourses. Respondents rate their agreement with statements on a six-point scale, with half the items reverse-scored. A constant of 20 is added to every total, which creates a neutral midpoint of 100. Scores can range from 40 to 160, with those above 100 classified as “high Machs” and those below as “low Machs.”
The scale isn’t a diagnostic instrument. It places people along a continuum. Someone scoring 105 is only mildly above the midpoint, while someone at 140 would endorse most of the trait’s defining beliefs: that most people are lazy, untrustworthy, and best handled through strategic maneuvering.
Empathy in High Scorers
A large meta-analysis covering 70 studies and over 230 separate measurements examined how Machiavellianism relates to two kinds of empathy. Cognitive empathy is the ability to understand what someone else is thinking or feeling. Affective empathy is actually feeling those emotions yourself, experiencing a pang of sadness when someone else is sad, for instance.
The results were clear: high Machiavellianism is most strongly linked to low affective empathy, with a moderate negative correlation of -0.36. These individuals understand emotions in others reasonably well, but they don’t share those emotions internally. Once researchers accounted for this lack of emotional resonance, the apparent deficits in cognitive empathy largely disappeared. In other words, people high in Machiavellianism can read a room. They just aren’t moved by what they see, which is precisely what makes strategic manipulation possible.
The Dark Triad Connection
Machiavellianism is one of three personality traits that psychologists group together as the “Dark Triad,” alongside narcissism and psychopathy. All three share a core of callousness and self-serving behavior, but they differ in important ways.
- Machiavellianism centers on manipulativeness and moral indifference. The high-Mach person is calculating and patient, preferring long-term strategy over impulsive action.
- Narcissism revolves around a grandiose sense of self-importance and an excessive need for admiration. Narcissists want to be seen as special.
- Psychopathy is defined by a lack of empathy combined with antisocial behavior. Psychopathic traits tend toward impulsivity and aggression, in contrast to the Machiavellian preference for careful planning.
The three traits correlate with each other but remain statistically independent. Someone can score high on one and low on the others. Research on humor styles illustrates the distinction nicely: Machiavellianism best predicts the use of irony, while psychopathy correlates most strongly with mockery styles like sarcasm and cynicism, and narcissism leans toward lighter, more self-enhancing humor.
What Happens in the Brain
Brain imaging studies using social dilemma games, where participants decide whether to cooperate or betray a partner for money, reveal distinct activity patterns in high scorers. When deciding whether to cheat a partner, high-Mach individuals show elevated activity in areas associated with reward-seeking and risk assessment. At the same time, regions linked to conflict monitoring light up, suggesting they feel genuine tension between the social norm to cooperate and the temptation to defect for personal gain.
When responding to another player’s decision, high scorers show increased activity in brain areas tied to planning, mental flexibility, and making inferences about others’ intentions. This pattern aligns with the behavioral profile: Machiavellianism isn’t thoughtless selfishness. It’s effortful, strategic calculation that recruits higher-order cognitive resources.
Machiavellianism at Work
The workplace is where Machiavellian traits often become most visible, and most damaging. High scorers are more willing to manipulate coworkers to gain advantages, and they tend to employ emotional manipulation specifically: managing other people’s feelings to push them into behaviors they wouldn’t otherwise pursue. This might look like guilt-tripping a colleague into taking on extra work, stoking anxiety to undermine a rival, or strategically withholding praise.
Research links Machiavellianism to counterproductive work behaviors directed at individuals rather than the organization as a whole. That means insults, personal aggression, and interpersonal sabotage are more common than theft or absenteeism. These behaviors can erode trust, damage collaboration, and create a toxic environment. For the people on the receiving end, being manipulated at work is associated with increased stress, anxiety, and depression.
Romantic Relationships and Intimacy
In dating and romantic partnerships, higher Machiavellianism scores predict a greater likelihood of using deceptive tactics, things like exaggerating accomplishments, hiding unflattering information, or misrepresenting intentions. These individuals also report lower levels of intimacy in their relationships, likely reflecting the same emotional detachment that shows up in empathy research. They are less willing or less able to forge deep emotional bonds because their orientation is fundamentally self-serving rather than partner-oriented.
Some researchers have suggested that manipulative strategies work better in short-term relationships, where there’s less time for a partner to catch on, and predicted that high scorers would cycle through frequent but brief romances. The evidence on that point is mixed. Some high-Mach individuals do maintain long-term relationships, possibly because partners perceive their ambition and social skill as assets worth keeping around.
Gender plays a role in how these dynamics unfold. For men, higher Machiavellianism and a greater number of past relationships both independently predicted more deceptive dating behavior. For women, the relationship was more nuanced: those with fewer past relationships showed a stronger link between Machiavellianism and deception, while prior relationship experience appeared to dampen the tendency to use manipulative tactics.
Why the Trait Persists
From an evolutionary standpoint, Machiavellianism represents what researchers call a “cheater strategy.” In any cooperative social group, there’s an advantage to free-riding, letting others follow the rules while you bend them for personal benefit. This strategy works as long as cheaters remain a minority. If everyone defected, the social system would collapse, but a small percentage of strategic manipulators can thrive within a cooperative majority.
This framework helps explain why Machiavellian traits haven’t been selected out of the population. They carry real social costs, including damaged relationships and reputational risk, but they also confer advantages in competition for resources, status, and mating opportunities. The trait persists not because it’s universally beneficial but because it’s effective enough, in the right circumstances, to keep propagating.