These essays explore the increase in interest in non-lethal weapons. Such devices have meant that many armed forces and law enforcement agencies are able to act against undesirables without being accused of acting in an inhumane way. Topics for discussion in this volume include: an overview of the future of non-lethal weapons; emerging non-lethal technologies; military and police operational deployment of non-lethal weapons; a scientific evaluation of the effectiveness of non-lethal weapons; changes in international law needed to take into account non-lethal technologies; developments in genomics leading to new chemical incapacitants; implications for arms control and proliferation; the role of non-lethal weapons in human rights abuses; conceptual, theoretical and analytical perspectives on the nature of non-lethal weapons development.