CEP Senior Advisor Alexander Ritzmann and CEP Senior Research Analyst Sofia Koller write: "[Translation] Radicalisation, extremism and terrorism are neither purely domestic nor solely foreign policy challenges for the security of the Federal Republic of Germany. Over the past 20 years, dealing with Islamist extremism and terrorism has repeatedly dominated the security policy agendas of domestic and foreign policy. At the same time, well-known phenomena such as right-wing extremism and newer forms of conspiracy ideologies such as QAnon, COVD-19 deniers or Reich citizens have increased in relevance. All these extremist phenomena have a strong transnational dimension."