Violent left-wing extremism and terrorism remain significant forms of ideologically motivated violence in Europe and North America. The phenomenon includes anarchist, communist, Marxist-Leninist, autonomous, and militant antifascist actors. While many left-wing groups operate lawfully, a smaller violence-oriented milieu accepts, justifies, supports, or conducts attacks against political opponents, police officers, government institutions, businesses, and critical infrastructure.
The Counter Extremism Project examines this threat across its ideological, organizational and operational dimensions. Its research covers historical terrorist organizations such as the Red Army Faction, contemporary violent Antifa and autonomous networks, anarchist groups, militant animal-rights movements and decentralized formations such as black blocs. CEP also analyzes how these actors recruit, communicate, mobilize, finance operations, select targets, and cooperate across borders.
A central focus is the organizational flexibility of contemporary violent left-wing networks. Many operate without formal hierarchies or permanent membership structures. Instead, they rely on personal contacts, trusted local groups, encrypted or semi-private communications, activist media platforms, and temporary operational cells. This can make them difficult to identify and can allow individuals to move between protest environments, political networks, support structures, and violent activity.
CEP’s current work pays particular attention to Europe. It assesses the rise of politically motivated violence, attacks directed against political parties and perceived right-wing opponents, police-targeted violence, infrastructure sabotage, transnational networks, youth mobilization, financial strategies, and the role of (returning) foreign fighters from the wars in Syria/Irak and Ukraine. It also examines the interaction between violent left-wing extremism, antisemitism, anti-Israel mobilization, organized crime, and other extremist milieus.
CEP distinguishes between lawful political activism, broad ideological milieus, violence-oriented actors, and organized violent actors. The category violence-oriented includes actors who commit or prepare violence as well as those who support, endorse, or encourage it.
The purpose of this research is to improve public understanding and support evidence-based policy.