This paper reviews peer-reviewed literature on the characteristics and risk factors associated with violent behavior. The analysis identifies key predisposing factors including gender, personality traits, impulsivity, marital status, and environmental stressors. The paper distinguishes between reactive violence—emotion-based responses to direct threats that are typically isolated incidents—and instrumental violence, which is planned, manipulative, and associated with psychopathic traits. The review emphasizes that while men show higher rates of violent behavior than women, virtually anyone can become violent under certain circumstances. Additionally, personality disorders and aggression levels correlate with violent tendencies, and individuals predisposed to instrumental violence often show limited responsiveness to antipsychotic medications.
The headlines today are filled with anecdotal accounts of people described as "the quiet type" who then commit seemingly inexplicable violent acts. Conversely, violent acts are sometimes committed by people presciently described as "a bomb waiting to explode." Furthermore, it is reasonable to suggest that virtually anyone can become violent under certain circumstances. To determine the facts, this paper reviews relevant peer-reviewed literature concerning the characteristics of individuals who may become violent and discusses how these characteristics contribute to increased violence in those who are mentally ill. A summary of the research and important findings concerning predispositions to violence are provided in the conclusion.
A number of factors can contribute to a predisposition to violence, including gender, personality traits such as impulsive-aggressive behaviors, marital status, and various environmental stressors (Kumar & Rajmohan, 2013). Studies have shown that men are more likely to become violent than women, and anger and resentment are both positively correlated with violent tendencies (Kumar & Rajmohan, 2013). Additionally, mental illness has been repeatedly documented as a contributing factor to violent episodes (Kumar & Rajmohan, 2013). Likewise, general anger levels and personality disorders have been repeatedly shown to be prevalent among violent men (Holzworth & Saunders, 2009).
It is important to note that there are two fundamentally different types of violence: reactive violence and instrumental violence (Antonius & Sinclair, 2013). As the term implies, reactive violence is emotion-based and is usually a response to direct threats or provocations. This type of violent response may be justifiable and can even be legally protected. For instance, according to Black's Law Dictionary (1990), provocations such as "fighting words" can be legal cause for a violent response. Black's defines "fighting words" as "The First Amendment doctrine that certain utterances are not constitutionally protected as free speech if they are inherently likely to provoke a violent response" (1990, p. 627). Reactive violence is most likely an isolated incident that will not repeat unless comparable circumstances present themselves again in the future (Antonius & Sinclair, 2013).
By sharp contrast, instrumental violence is aggressive behavior that is "manipulative, callous, planned, and often motivated by goals" (Antonius & Sinclair, 2013, p. 588). This type of violence is characterized by core psychopathic characteristics, and these personality types are more likely to commit multiple acts of violence during their lifetimes (Antonius & Sinclair, 2013). More troubling still, personality types predisposed to violence are not typically responsive to antipsychotic medication regimens (Antonius & Sinclair, 2013).
"Psychopathic traits and medication resistance in violent offenders"
Men were shown to be more likely to become violent than women, but the research showed that it is possible for anyone to respond in a violent fashion when sufficiently provoked. This type of reactive violence, though, is usually isolated and limited to a single episode. By contrast, instrumental violence is associated with core psychopathic characteristics and is not usually readily amenable to pharmacological interventions. In the final analysis, it is reasonable to conclude that humankind will always experience violence, but some people are more predisposed to engage in violent behaviors than others due in part to their personality traits.
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