Conventional ideas about gender and sexuality dictate that people born with male bodies naturally possess both a man’s identity and a man’s right to authority. Recent scholarship in the field of gender studies, however, exposes the complex political technologies that construct gender as a supposedly unchanging biological essence with self-evident links to physicality, identity, and power. In Masculinities without Men? Jean Bobby Noble explores how the construction of gender was thrown into crisis during the twentieth century, resulting in a permanent rupture in the sex/gender system, and how masculinity became an unstable category, altered across time, region, social class, and ethnicity.