Evil is one of the most enduring and provocative concepts in human thought. From religious doctrine to philosophical inquiry, from horror films to political rhetoric, the idea of evil evokes fear, fascination, and moral urgency. But what happens when individuals believe themselves to be evil — or when they see the world strictly divided into good and evil? What are the psychological and social consequences of such binary thinking? And how can humor, often seen as harmless or cathartic, become a weapon in these moral battles?