Definition
Terrorism is the calculated use of violence, or the threat of it, against civilians and non-combatants in order to spread fear and pressure a government or society into political, religious, or ideological change.
What distinguishes terrorism is its logic of audience. The immediate victims are not the real target; the violence is a message aimed at a much larger population and at those who govern it.
Why it matters
How it works
Terrorism works by exploiting the gap between the small scale of an attack and the large scale of the reaction it provokes. A single act, amplified by media and fear, can pressure a state into concessions, harsh crackdowns, or costly over-reactions.
This makes it a tool for actors who cannot win by conventional force. The strategy depends on a responsive audience: without publicity and public fear, the violence loses its leverage. It also makes terrorism vulnerable — when a population refuses to be terrorized, the strategy fails. Criminology has long debated whether terrorism is a distinct category at all or merely politically motivated violence that resembles other organised offending, with cohabiting risks of overreach in counter-terrorism law that erode civil liberties for the wider population.