The nature of armed conflict has changed in recent decades. This presents new challenges for the prevention of violence, the promotion of disarmament and the securing of durable peace. The essays in this book address important aspects related to these challenges, with references to the work of prominent German peace researcher Herbert Wulf. Topics covered include demilitarization, small arms control, security sector reform, post-conflict construction, peace-building in failed states and, as guiding theme, the limits and possibilities of security governance.