The Adelphi series of books is the International Institute for Strategic Studies’ principal contribution to policy-relevant, original academic research and is designed to provide rigorous analysis of strategic and defence topics that is useful to politicians and diplomats, as well as academic researchers, foreign-affairs analysts, defence commentators and journalists. Ever since the publication of Alastair Buchan’s 'The Evolution of NATO' in 1961, the Adelphi series has been the principal contribution of the IISS to policy-relevant, original research on strategic studies and international political concerns. Over the years, Adelphis have provided high-quality analysis of key security issues, serving to inform opinion, to stimulate debate and to challenge conventional thinking. The series permits the IISS both to remain responsive to events and to contribute significantly not only to debate on strategic affairs but also to the development of policy. The series includes both thematic studies and papers on specific national and regional security problems.Read the Instructions for Authors for information on how to submit your article.