Conspiracy thinking and the spread of conspiracy narratives pose a relevant problem for democratic society and democratic institutions. Based on anti-democratic, anti-pluralistic assumptions that question democratic representation and procedures in general, through the dissemination of misanthropic content, conspiracy narratives can contribute to radicalisation processes that can sometimes lead to acts of violence. Conspiracy thinking is not a new phenomenon. It is an integral part of extremist ideologies and images of humanity worldwide, usually characterised by anti-Semitism and racism, even if the individual points of reference are sometimes very different. During the Covid-19 pandemic, conspiracy narratives and the dangers they pose became particularly visible. Acts such as the so-called “petrol station murder” in Idar-Oberstein in 2021, the affinity for weapons and the increasing acts of violence in the so-called “Reichsbürger” milieu, which is characterised by conspiracy ideology, but especially the attacks in Halle and Hanau, in which the perpetrators were also motivated by conspiracy ideology, illustrate how great the need for action is. Conspiracy thinking is a serious threat to our society and appropriate prevention and counselling measures are an important pillar of our joint efforts to preserve our democracy.