The volume is based on the core argument that gender is conceptually necessary to thinking about central questions of security; analytically important for thinking about cause and effect in security; and politically important for considering possibilities of making the world better in the future. Contributions to the volume look at various aspects of studying gender and security through diverse lenses that engage diverse feminisms, with diverse policy concerns, and working with diverse theoretical contributions from scholars of security more broadly. It is grouped into four thematic sections: This handbook will be of great interest to students of gender studies, security studies and IR in general.