Graig Klein
Assistant professor
- Name
- Dr. G.R.E. Klein
- Telephone
- 070 8009506
- g.r.e.klein@fgga.leidenuniv.nl
- ORCID iD
- 0000-0002-1745-6712
Graig Klein is an Assistant Professor in Terrorism and Political Violence at the Institute of Security and Global Affairs. His research explores the instrumentality of political violence and how dissident–government interactions affect tactical and strategic evolution, conflict processes, and international and national security – primarily protests and terrorism. He leads the ERC-funded project TERGAP, which focuses on how non-state actors adapt their violent tactics in response to government behaviour and new opportunities to recruit both non-violent and violent activists. He teaches in the Crisis and Security Master’s Programme.
More information about Graig Klein
News and media
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From theory to diplomacy: MIRD students present final thesis -
ISGA researchers featured in international media -
Joana Cook and Graig Klein Awarded Google Trust & Safety Research Grant -
Innovating terrorism with AI -
Graig Klein awarded an ERC Starting Grant -
ERC Starting Grants for seven Leiden researchers
Research output
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Sentiment Shifts and a New Approach to Strategic Narratives Analysis: Russian Rhetoric on Ukraine -
The Buffalo attack – An analysis of the manifesto -
Focusdata: Foreign Policy through Language and Sentiment -
Refugees, Perceived Threat & Domestic Terrorism -
Strategic Interaction of Governments and Terrorist Groups in Times of Economic Hardship -
Presidential use of diversionary drone force and public support
PhD candidates
See also
Research projcet
Graig Klein is an Assistant Professor in Terrorism and Political Violence at the Institute of Security and Global Affairs. His research explores the instrumentality of political violence and how dissident–government interactions affect tactical and strategic evolution, conflict processes, and international and national security – primarily protests and terrorism. He leads the ERC-funded project TERGAP, focusing on how non-state actors adapt their violent tactics in response to government behaviour and new opportunities to recruit both non-violent and violent activists. He teaches in the Crisis and Security Master’s Programme.
Graig is currently leading an ERC Starting Grant project, TERGAP, collecting new counterterrorism data to test theories of terrorist group strategic decision-making and adaptive violence. He is also Co-Investigator on a Google-funded project exploring extremist and terrorist use of artificial intelligence (AI) and potential counter-measures. His research has been published in leading international peer-reviewed journals, presented to senior government and security leadership, including NATO, U.S. Northern Command, and NORAD, and he has been an invited guest multiple times on BBC Radio and BBC World News. You can learn more about Graig’s research on his website (www.graigklein.com).
Prior to joining ISGA, Graig was an Assistant Professor of Security Studies at New Jersey City University, where he helped establish his department as an Intelligence Community Centre for Academic Excellence, funded by a U.S. Defense Intelligence Agency grant. The grant also funded the development of the FOCUSdata Project, designed to analyse how a country’s official media and foreign ministry communications interact with kinetic actions. Graig has also served as an Academic Principal Investigator for the World Bank. He has studied and conducted fieldwork in Egypt and the Kurdistan Region of Iraq. Graig holds a PhD in Political Science from Binghamton University and an MA in International Peace and Conflict Resolution from American University.
Assistant professor
- Faculty of Governance and Global Affairs
- Institute of Security and Global Affairs
- Terrorism and political violence
- Klein G. R. (11 March 2026), As Iran war reaches Europe's borders, can the continent really rest easy?. Interviewed by Denis Loctier. [interview].
- Klein G. R. (16 March 2026), Aanslagen bij joodse gebouwen geclaimd door Ashab Al Yamin. Wat is er bekend over die groep?. Interviewed by Laurie Treffers, Cover Story: A7. [interview].
- Klein G. R. (11 March 2026), Iran may tap into organised crime to carry out terror attacks, expert says. Interviewed by Mark Owen (France24 English). [interview].
- Klein G. R. (25 February 2026), IŞİD’in Yalova’dan Türkiye’ye yayılan izleri: BBC Türkçe araştırdı [The traces of ISIS spreading from Yalova to Türkiye: BBC Turkish investigated]. ( BBC News Türkçe). [interview].
- Klein G. R. (25 February 2026), IŞİD-Horasan örgütü hakkında neler biliniyor, Türkiye'de aktif mi? [What is known about the ISIS-Khorasan organization, and is it active in Türkiye?]. Interviewed by Mahmut Hamsici. [interview].
- Klein G. R. (24 February 2026), BBC Türkçe araştırdı: Yalova'daki çatışma Türkiye'de IŞİD'le ilgili riskler konusunda ne anlatıyor? [BBC Turkish investigated: What does the conflict in Yalova tell us about the risks related to ISIS in Türkiye?]. Interviewed by Mahmut Hamsici. [interview].
- Klein G. R. (16 March 2026), Deze groep is mogelijk verantwoordelijk voor explosies Joodse doelen: 'Uit het niets ontstaan' [This group is possibly responsible for explosions at Jewish targets: 'Arising out of nowhere']. Interviewed by Mitsuko Teiwes. [interview].
- Klein G. R. (16 March 2026), RTL Nieuws [RTL News]. Interviewed by Jeroen Wetzels for RTL Nieuws 19:30 uur (RTL). [interview].
- Klein G.R. (2 January 2025), The World Today - New Orleans Terrorist Attack. Interviewed by Maryam Moshiri for The World Today (BBC). [interview].
- Klein G.R.E. (19 October 2024), BBC: Good Morning Scotland. for Good Morning Scotland (BBC Radio Scotland). [interview].
- Klein G.R. 2024 - 2024. Terrorism Experts Conference and Executive Level Defence Against Terrorism Seminar which will be conducted as a residential event between 16-17 October 2024. NATO Center of Excellence - Defence Against Terrorism. Ankara, Turkey. [advice].
- Klein G.R.E. (14 November 2024), BBC Arabic News Bulletin. for News Bulletin (BBC Arabic). [interview].
- Klein G. R. (21 December 2024), BBC World News. for BBC World News (BBC). [interview].
- Klein G. R., Zelis A., Arjoubb O., Drevon J., McDonald B. & Turkmani R. (17 December 2024), Suriye'de HTŞ ve SMO, Esad sonrası dönemde birlikte çalışabilecek mi? (Will HTS and SMO be able to work together in the post-Assad era in Syria?). Interviewed by Merve Kara-Kaska. [interview].