Traditional mainstream explanations tend to stress the importance of factors such as the 'maximization of power', the persuit of 'national security interests' and the role of 'structure' in a largely anarchic international system. This book does not dismiss these approaches, but argues that British experience suggests that focusing on 'beliefs', 'culture' and 'identity', provides a more useful insight and distinctive intepretation into the process of British nuclear decision making than the more traditional approaches.