Foresight studies on the defence and security environment reflect a shift in security thinking away from a focus on state-centric threats towards a much broader view of security risks that includes risks presented by the vulnerability of European society to the failure of critical infrastructure, to pandemics, environmental change and resource based conflicts. The authors place a particular emphasis on the treatment of technological change in these defence and security foresight studies and argue that the growing importance of dual-use technologies is likely to mean that defence will play a declining role as a sponsor and lead-user of advanced technologies in the future.