Check out this new article by Emily Corner and colleagues titled Modelling Drivers of Grievance-Fuelled Violence. The paper takes on a big question: how do we explain acts of violence by lone offenders when the old categories of “terrorist”, “criminal”, or “mentally disordered” don’t quite fit? The authors argue that looking at these cases through the lens of grievance-fuelled violence gives us a better understanding of what drives them.
The study sets out to test whether existing models of violent extremism still hold up in today’s shifting threat environment. It looks at whether lone offenders who commit acts like terrorism, hate crime, intimate partner homicide or mass shootings can be better understood as motivated by grievance, rather than by ideology alone.
The research team started with a systematic review of nearly 75,000 studies, narrowing this down to 99 conceptual and empirical models of violent extremism. They worked with an expert panel to identify the most relevant variables, building a codebook of 78 indicators. Then they applied this framework to 120 cases of offenders in Australia, New Zealand, the UK, Europe, the US and Canada between 2013 and 2022. These offenders had either planned or carried out an act of violence. The team coded each case using legal records, court transcripts, news sources and other open-source material, then ran statistical analyses in R to model how grievances develop over time.
The study found that grievance-fuelled offenders often shared certain risk factors. Instability or deterioration in living conditions, experiences of social rejection, anger, emotional problems, and prejudices against others all increased the likelihood of grievance forming. Importantly, these factors did not act alone. They interacted. For example, instability in housing combined with prejudices was more likely to lead to grievance than either on its own. Revenge emerged as a consistent red flag, often appearing late in the sequence leading to violence, while instability in living conditions tended to appear at the start. Interestingly, expressing needs sometimes reduced the risk of grievance escalation, suggesting a potential protective factor.
Policy and Research Implications
For policymakers and practitioners, this work offers a new model for assessing risk that goes beyond ideological labels. It suggests that focusing only on ideology misses critical early warning signs, such as social rejection or unstable living conditions. Practically, the research points to the value of interventions in mental health, housing and social care as ways to disrupt grievance formation before it escalates into violence. For researchers, the paper provides one of the first empirical models of grievance-fuelled violence, laying groundwork for more systematic studies that cut across traditional offence categories.