Lone attackers have attracted considerable attention from the media, policymakers and academics. This is partly due to the terrorist attacks Europefaced in the last couple of years executed by... Show moreLone attackers have attracted considerable attention from the media, policymakers and academics. This is partly due to the terrorist attacks Europefaced in the last couple of years executed by—seemingly—lone attackers.Academic research has explored topics like the demarcation between loneattackers and terrorist cells or networks, typologies of lone attackers, themotivation of lone attackers, and—lately—the attack patterns of lone actors.This chapter will analyse the changed understanding of lone actorviolence and discuss possible preventive approaches. Show less