This book delves into legal and ethical concerns over the increased weaponization of outer space and the potential for space-based conflict in the very near future. Unique to this collection is the emphasis on questions of ethical conduct and legal standards applicable to military uses of outer space. No other existing publication takes this perspective, nor includes such a range of interdisciplinary expertise. The essays included in this volume explore the moral and legal issues of space security in four sections. Part I provides a general legal framework for the law of war and peace in space. Part II tackles ethical issues. Part III looks at specific threats to space security. Part IV proposes possible legal and diplomatic solutions. With an expert author team from North American and Europe, the volume brings together academics, military lawyers, military space operators, aerospace industry representatives, diplomats, and national security and policy experts. The experience of this team provides a collection unmatched in any academic publication broaching even some of these issues and will be required reading for anyone interested in war and peace in outer space.