After every terror attack, people ask “what kind of person does this?” and brace to find madness or evil. But decades of research keep finding the opposite: terrorists are, psychologically, disturbingly normal, no more mentally ill than anyone else. So psychologist Fathali Moghaddam flipped the question, and stopped asking what kind of person (Moghaddam, 2005).
He asked what kind of staircase.
The metaphor
Picture radicalization as a staircase inside a building. The ground floor is enormous and holds almost everyone. Each floor above is smaller than the last. And here is the whole idea:
The higher you climb, the fewer exits you can see. By the top, only one door is left.
Nobody leaps from “life is unfair” straight to “kill people.” They climb it one small step at a time, and at each step, the alternatives quietly vanish.
The six floors
Each floor is one question, and one psychological shift:
| Floor | The question | What is happening |
|---|---|---|
| Ground | “Is this fair?” | A sense of injustice and relative deprivation (feeling wronged compared to others). Billions live here. It is normal. |
| 1 | “Can I fix it?” | You seek a real path: a voice, a vote, a way to be heard. |
| 2 | “Who’s to blame?” | Blocked and angry, you hunt for a target: a government, or a scapegoat. |
| 3 | “They deserve it.” | A group hands you a cause. Harm becomes a duty: moral disengagement in uniform. |
| 4 | “Us or them.” | Isolation, secrecy, total us-versus-them. The line hardens. |
| 5 | “The act.” | The last inhibitions are sidestepped, and the attack happens. |
Floor 1 is the exit that matters most. When people find a real way to fix what feels unjust, they leave the staircase here, and never climb higher.
The part that changes everything
Look at the shape of the staircase. It is a pyramid: the floors shrink as they rise, because the options shrink as you climb.
- On the ground floor, you have every option.
- By Floor 4, you have almost none.
- By Floor 5, the group has arranged things so that destruction feels like the only door left.
That is why, in the animation, a door slams shut with every step forward. Radicalization is not a decision. It is a slow narrowing until only one choice remains, and then that choice feels inevitable.
Why this matters
- It is a process, not a personality. There is no “terrorist type.” Ordinary people, climbing ordinary-looking steps. That is the disturbing part, and the hopeful one.
- The cure lives on the low floors. Since most people exit on Floor 1, the way to stop violence is to keep the low exits open: give people real voice, real hope, and a genuine path to fix what feels unjust. You win this on the ground floor, not the top.
- Watch for the exits closing. In your own life, in a friend, in a movement: the danger sign is not anger. It is anger plus shrinking options, when every path but one has been quietly talked away.
Radicalization is rarely a leap. It is a climb, and the trick is that each step removes the stairs behind you.