Purpose of Review <p>Involuntary celibacy, as expressed in the contemporary online incel community, has evolved from a marginal sexual condition first studied in the late 1990s to a male-dominated digital subculture that intersects with mental health, gender-based violence, and democratic security agendas.</p> Recent Findings <p>This critical narrative review synthesizes peer-reviewed empirical and conceptual literature published primarily between 2020 and 2026 on the demographics, psychological profile, ideological architecture, online radicalization pathways, violence risk, and public health implications of the incel phenomenon.</p> <p>Self-identified incels show severe mental health burdens, including elevated depression, anxiety, loneliness, suicidal ideation, autism spectrum traits, and disengagement from education and employment. The “black pill” worldview that organizes much of incel discourse is based on biological determinism, lookism, and hypergamy claims, producing hopelessness and displaced rage. Pathway analyses indicate that mental health distress and ideological adherence each predict harmful attitudes more strongly than online networking, with both factors operating bidirectionally. The empirical relationship between incel ideology and outward-directed violence is contested, while the connection to self-directed violence is well supported.</p> Summary <p>An adequate response to the incel phenomenon refuses both pure securitization and pure pathologization, integrating clinical engagement, education policy, platform governance, gender justice frameworks, and suicide prevention. Cross-cultural research, particularly in Southeast Asian and other Global South contexts, remains a research priority of the highest order.</p>