Masculinism, meninism, homonism: whatever the term, this movement has long been underestimated in France and Europe, while in Canada and the USA it is recognized as a form of violent extremism. Masculinism aims to preserve men's privileges from a patriarchal perspective, waging a veritable "campaign" against women and feminocracy. Originally born in favor of fathers' rights, this movement has evolved to adopt an oppositional posture, manifesting itself in physical and online attacks. The aim of this book is to raise public awareness of the reality of masculinism, seen as a new war on women and an emerging form of radicalization.