Domestic violence doesn’t have a single cause. It emerges from a web of individual, relationship, community, and societal factors that interact in complex ways. Nearly 1 in 3 women globally, an estimated 840 million, have experienced partner or sexual violence during their lifetime. Understanding what drives this violence means looking at multiple layers simultaneously, from brain function and childhood experiences to financial stress and cultural beliefs about gender.
The Four Layers of Risk
The CDC uses what’s called a social-ecological model to explain violence. Rather than pointing to one thing, it maps four overlapping levels: individual factors (a person’s biology, history, and psychology), relationship dynamics (patterns within families and partnerships), community conditions (the neighborhoods and institutions people live in), and societal forces (cultural norms, economic policies, and systems of inequality). A person exposed to risk factors at multiple levels is far more likely to use violence than someone affected at just one.
This framework matters because it explains why two people with similar backgrounds can end up on very different paths. One person who grew up witnessing abuse might never become violent, while another does. The difference often comes down to which protective or risk factors are present across the other three levels.
Childhood Trauma and Learned Behavior
One of the strongest predictors of future violence is growing up in a home where it already exists. Boys who witness intimate partner violence in childhood are roughly 56 to 63% more likely to perpetrate it as adults, depending on the severity of what they saw. This isn’t destiny, but it is a significant increase in risk.
The pathway from childhood trauma to adult violence runs through several channels. Adverse childhood experiences (ACEs) like abuse, neglect, or household dysfunction are linked to higher rates of depression, anxiety, and impulsivity in adulthood. Each of these, in turn, increases the likelihood of perpetrating partner violence. In one study of couples, a male partner’s childhood adversity was connected to partner violence through both depression and impulsivity, while a female partner’s childhood adversity operated primarily through depression.
Childhood trauma also shapes beliefs. Research has shown that violent experiences in childhood generate rigid, anti-feminist beliefs about gender roles that remain stable over time, and these beliefs independently predict physical and sexual violence against female partners. In other words, growing up around violence doesn’t just affect emotional regulation. It can distort a person’s understanding of how relationships are supposed to work.
How the Brain Processes Anger Differently
People who commit violence often show measurable differences in how their brains handle emotions. The front part of the brain is responsible for impulse control, decision-making, and reading other people’s emotional expressions. A large meta-analysis found that violent individuals, particularly those convicted of intimate partner violence, tend to have reduced volume in these areas compared to non-violent people.
The practical effect: the brain’s “braking system” for aggressive impulses works less efficiently. When provoked, people convicted of partner violence show less activity in the region that normally helps suppress aggressive responses. At the same time, the connections between the front of the brain and the amygdala (which processes fear and threat) are weaker, meaning emotional signals can be misread as hostile or threatening when they aren’t. Damage to these areas, whether from genetics, head injuries, or the neurological effects of childhood trauma, is associated with difficulty recognizing emotions in others, behavioral disinhibition, and impulsivity.
None of this excuses violence. But it helps explain why some people escalate to aggression in situations where others wouldn’t, and why treatment programs increasingly focus on emotional regulation skills.
Alcohol and Substance Use
Substance use is one of the most commonly cited factors in domestic violence, and the data supports the connection, though with important caveats. Among people who perpetrate intimate partner violence, alcohol use disorders are the most prevalent substance issue at about 22%, followed by cannabis use disorders at roughly 6%. Cocaine and opioid use disorders are less common among perpetrators, at around 2% and 1.5% respectively.
Alcohol doesn’t cause violence on its own. Plenty of people drink without ever becoming abusive. What alcohol does is lower inhibitions and impair the already-strained impulse control systems described above. For someone who already has risk factors like childhood trauma, rigid beliefs about control in relationships, or neurological differences in emotional regulation, alcohol acts as an accelerant. It makes existing patterns worse and makes violent episodes more severe.
Financial Stress and Unemployment
Economic hardship is a powerful and often underestimated driver of domestic violence. Research from the National Institute of Justice found that couples experiencing high levels of financial strain reported intimate partner violence at a rate of 9.5%, compared to just 2.7% among couples with low financial strain. That’s more than a threefold difference.
Employment instability tells a similar story. When a male partner was continuously employed, the rate of partner violence was 4.7%. After one period of unemployment, it rose to 7.5%. After two or more periods of unemployment, it reached 12.3%. Financial stress doesn’t just increase the risk of violence starting. It also makes it harder for victims to leave. Women at greatest risk tend to be in relationships where the couple has few economic resources and lives near economically disadvantaged neighborhoods. The calculation becomes painful: a partner’s financial contribution to the household may feel like it outweighs the risk of staying.
This creates a vicious cycle. Intimate partner violence leads to mental and physical health problems for victims, which decreases their ability to hold a job, which deepens financial dependence on the abuser.
Power, Control, and Gender Norms
At the societal level, cultural norms about gender and power play a central role. Communities and cultures that treat violence as an acceptable way to resolve conflicts, or that reinforce rigid hierarchies within relationships, consistently show higher rates of domestic violence. These aren’t abstract ideas. They translate into specific beliefs: that a husband has authority over a wife’s behavior, that “disciplining” a partner is acceptable, or that masculinity requires dominance.
These beliefs are measurable and predictive. Studies have shown that holding anti-feminist gender role beliefs directly predicts physical and sexual violence against female partners. Critically, these beliefs act as a bridge between childhood trauma and adult violence. A person who experiences abuse growing up is more likely to adopt rigid views about gender, and those views then increase the risk of perpetrating violence in their own relationships. Progressive social change has not eliminated these attitudes. They persist even in contexts of broader cultural shifts toward equality.
Relationship Dynamics That Escalate Risk
Within individual relationships, certain patterns make violence more likely. High levels of conflict, poor communication, one partner’s desire for control over the other’s finances or social connections, and isolation from friends and family all contribute. Jealousy and possessiveness, often framed as love or protectiveness early in a relationship, frequently escalate into monitoring, restricting movement, and eventually physical violence.
The influence of a person’s immediate social circle matters too. Partners, peers, and family members shape behavior. When someone’s closest relationships normalize aggression, dismiss abusive behavior, or model controlling dynamics, the threshold for violence drops. Prevention programs that focus on this level, strengthening communication skills, promoting healthy relationship norms among peer groups, and building conflict resolution abilities, target one of the most actionable layers of risk.
Community and Neighborhood Conditions
Where people live shapes the likelihood of domestic violence in ways that go beyond individual choice. Neighborhoods with high poverty, residential instability, limited social services, and a high density of alcohol outlets consistently report higher rates of intimate partner violence. These are environments where stress is elevated, resources are scarce, and community support networks are thin.
This doesn’t mean domestic violence is confined to disadvantaged areas. It occurs across every income level, education level, and community type. But concentrated disadvantage amplifies every other risk factor. A person dealing with childhood trauma, unemployment, and substance use in a neighborhood without accessible mental health services or economic opportunities faces a very different set of pressures than someone with the same individual risk factors but more community support.
Why No Single Factor Is Enough
The scale of domestic violence is staggering. In 2024 alone, an estimated 50,000 women and girls were killed in the private sphere, roughly 137 per day, most by family members. Globally, 316 million women experienced physical or sexual violence from an intimate partner in just the past 12 months. These numbers reflect not a single broken mechanism but the accumulation of risk across every level: individuals carrying unresolved trauma, relationships built on control rather than respect, communities without adequate support, and societies that still tolerate or quietly endorse violence within homes.
What the research consistently shows is that domestic violence is driven by overlapping, reinforcing factors. Childhood exposure to violence reshapes both the brain and a person’s beliefs. Economic stress and substance use lower the threshold for aggression. Cultural norms about gender and power provide a framework that justifies control. And community conditions determine whether someone has access to the resources that could interrupt the cycle or whether they’re trapped in it.