'In this excellent Adelphi book, Jeffrey Mazo sheds revealing analytical light on the consequences of climate change for international security. Impressive in scope, and admirably measured, Mazo’s forensic examination of the science, history and likely strategic impact of climate change is required reading for national-security policymakers and practitioners and will have broader appeal for all those interested in understanding one of the great challenges of our time.’ Professor Alan Dupont, Director of the Centre for International Security Studies, Sydney University‘Dr Mazo authoritatively tackles a much overlooked, yet pivotal dimension of the broader climate change debate – the security implications of evolving climate trends. He makes a strong case, anchored in both contemporary developments and historical analysis, that climate change can serve as a ‘threat multiplier’, contributing to instability, exacerbating conflicts and complicating foreign-policy decision-making. This book is a must read for foreign-policy professionals.’Ambassador Paula J. Dobriansky, former US Under Secretary of State for Global Affairs