The effects of terrorism in one country spill over across national borders to reduce the trade of other nations. This reduction in trade is long lived and may make it harder to combat terrorism.
It cuts shuts down the chance for dialogue.
We asked two academics to check the claim made by UKIP leader Paul Nuttall.
Low-tech threats have been the biggest concern of late, but the Manchester bombing reminds us of a host of security concerns.
Hyperbolic approaches to threat measurement don’t lead to very effective counter-terrorism policy.
The government is set to increase its use of punitive security measures against individuals it can't bring to court.
After years of promises, the government still has not detailed how a bill to tackle extremism would work.
A new mathematical model of ISIS supporters' online behavior provides insights into how cyberactivity relates to real-world attacks.
Terrorist attacks that are locally sourced and financed are very hard to detect.
A frank debate about the causes of extremism and terrorism would acknowledge uncomfortable issues like the alienating impacts of racism, Islamophobia and Western military actions and foreign policy.
Talk of a 'clash of civilisations' and targeting refugees simply alienates the people the West needs to reach out to.