The Royal United Services Institute (RUSI) is a British think tank dedicated to defence and security issues. Established in 1831 by the Duke of Wellington, it is one of the oldest institutions of its kind and has long sought to bridge practical military experience and academic analysis. RUSI publishes research, hosts public events and briefings, and produces commentary intended for policymakers, practitioners and a general audience. For official information see the RUSI site.

History and purpose

Founded in the early 19th century, the institute grew from officers' clubs and societies that exchanged ideas about military science and strategy. Over time RUSI broadened its remit to cover international security, peacekeeping, intelligence, and new domains such as cyber and space. Its founding patron, the Duke of Wellington, symbolised the institute’s close historical links with the armed services. The organisation has marked milestones such as its 180th anniversary and has been recognised in specialist awards for its contribution to foreign policy debate.

Activities and outputs

RUSI’s work encompasses a mix of long-form research, timely commentary and practical events. Key activities include:

  • Research reports and policy papers on defence procurement, counterterrorism, cyber security, and strategic stability;
  • Regular conferences, seminars and roundtables that bring together government, military and industry representatives;
  • Training courses, fellowships and expert networks that support professional development and dialogue;
  • Media commentary and peer-reviewed publications intended to shape public debate.

Many of these outputs are available through the institute’s publications portal and event pages: publications and events.

Organisation and people

RUSI is typically governed by a council or board, led by a director and supported by research staff, fellows and visiting experts. Over the years it has been led by notable figures from military, diplomatic and academic backgrounds; for example, Michael Clarke has served as director. The institute’s presidency has often been held by a member of the Royal Family, reflecting its national status and historical roots.

Impact, reputation and distinctions

RUSI aims to influence policy through evidence-based recommendations and by convening stakeholders across government, the armed forces and industry. It has received recognition within the think-tank community for its quality of work and for fostering debate on defence and foreign policy. As with many policy institutes, its influence depends on the relevance and credibility of its research and the extent to which it engages with decision-makers.

Further information

For an institutional history and to explore current projects, readers can consult RUSI’s historical overview and resources: history and background. For the latest analyses and commentary, the publications and events pages provide up-to-date material.