VIOLENT EXTREMISMHow We Uncovered the Shared Personality Profile of Violent Extremists

By Joanna Lindström

Published 12 September 2023

Why do some people resort to violence for their cause? If we take a closer look at the rhetoric of known terrorists, they appear to have one thing in common. They all feel that their group, or a group they support, is unjustly disadvantaged. But not everyone who thinks that their group is unjustly disadvantaged resorts to violence. This begs the question of whether basic personality traits are at play.

Violent extremism – be it political or religious – is a persistent global problem, which has escalated considerably in the US in the last decade. Why do some people resort to violence for their cause?

Research on the causes of violent extremism has often focused on social or political explanations. It has particularly investigated Islamist extremism and marginalized individuals or groups in society.

Social and political factors no doubt play a role. But could there also be shared psychological characteristics among individuals who endorse group-based violence in different contexts? And could this extend to non-political forms of violence?

In a series of studies, my colleagues and I have unpacked the basic psychology of violent extremism.

Almost every month, there are reports in the news of violent extremism or politically motivated violence in the west. These include terror attacks in Europe, the storming of the Capitol in Washington, and violence occurring at political demonstrations (both left- and rightwing).

Different forms of violence seem to have different motivations. Rightwing extremism aims to preserve the status quo whereas leftwing extremism aims to overthrow it.

But if we take a closer look at the rhetoric of known terrorists, such as the London 7/7 bombers, the Christchurch mosque shooter  — or Islamistrightwing and leftwing movements – they appear to have one thing in common. They all feel that their group, or a group they support, is unjustly disadvantaged.

Humility and Emotional Sensitivity
We wanted to unpick the influence of personality on whether an individual endorses violence for their cause. Not everyone who thinks that their group is unjustly disadvantaged resorts to violence. This begs the question of whether basic personality traits are at play.

We’ve uncovered common personality and social psychological factors among those who endorse group-based violence in different contexts. In three studies, we gathered survey responses from 394 Black Lives Matters supporters in the US (during the 2020 protests), 252 immigration-critical Swedes, and 445 football supporters in Sweden.

We included measures of personality from the Hexaco personality inventory and social psychological factors. We also included items measuring support for violence, violent behavioral intentions and self-reported violence and aggression. Each of these measures was adapted for the specific context and type of violence.