While public attention has often centered on the most visible and violent expressions of incel ideology, this volume offers a deeper analysis, moving beyond reductive narratives to explore the complex social, psychological, and communicative dimensions of inceldom. Drawing on expertise from sociology, psychology, communication studies, and conflict resolution, contributors explore the historical development of incel ideology, the formation of incel identity, gendered aspects inceldom, the relationship between involuntary celibacy and violence, and the emergence of femcels and queer incel communities. The volume concludes by exploring avenues for disengagement from incel ideology, while offering concrete proposals for future research into the evolving dynamics of online radicalization and gendered alienation.