This book uses Deleuze’s work to understand the politics of masculinity today. It analyses masculinity in terms of what it does, how it operates and what its affects are. Taking a pragmatic approach, Hickey-Moody shapes chapters around key Deleuzian concepts that have proved generative in masculinity studies and then presents case studies of popular subjects and offers overviews of disciplines that have applied Deleuze’s work to the study of men’s lives. This book shows how the concepts of affect and assemblage have contributed to, and transformed, the work undertaken by the foundational concept of performativity in gender studies. Examining the work of Deleuze and Guattari on the psychoanalytic boy, as exemplified by their writing on Little Hans, Hickey-Moody reconsiders the politics of their approach to psychoanalytic models of young masculinity. In this context, the author examines contemporary lived performances of young masculinity, drawing on her own fieldwork.