More than forty years of commitment to nuclear weapons may have prepared Britain to take part in Armageddon, but not to defend itself against attack. What made British governments choose this path and how have they justified it? How have they responded to the moral questions it raises?Using material from recently-released official documents, Roger Ruston presents a moral history of British defence policy, from the 'lesson' of Appeasement to the nuclear modernizations of the eighties, and answers many of the questions that governments have avoided. The book will be of great interest to defence historians, moralists, politicians, and general readers who need a clear account of their country's defence predicament as a basis from which to devise workable and morally acceptable alternatives.