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  1. Homepage | Royal United Services Institute

    4 days ago · The Royal United Services Institute (RUSI) is the world’s oldest and the UK’s leading defence and security think tank. Our mission is to inform, influence and enhance public debate to …

  2. Royal United Services Institute - Wikipedia

    RUSI was founded in 1831, making it the oldest defence and security think tank in the world, at the initiative of the Duke of Wellington. Its original objective was to study naval and military science.

  3. Royal United Services Institute on The Conversation

    Dec 19, 2025 · The Royal United Services Institute (RUSI) is the world’s oldest and the UK’s leading defence and security think tank. Our mission is to inform, influence and enhance public debate to …

  4. Royal United Services Institute | World Economic Forum

    Nov 19, 2025 · The Royal United Services Institute (RUSI) is among the world’s oldest and one of the United Kingdom’s leading defence and security think tanks. Established in 1831, RUSI conducts …

  5. The RUSI Journal - Taylor & Francis Online

    Apr 20, 2026 · RUSI is a leading forum on national and international defense, including security, policy, and war examining past, present, and future issues in the field.

  6. Royal United Services Institute (RUSI) on JSTOR

    The Royal United Services Institute (RUSI) is the world’s oldest and the UK’s leading defence and security think tank. Its mission is to inform, influence and enhance public debate on a safer and more …

  7. About the Royal United Services Institute (RUSI)

    RUSI embodies nearly two centuries of forward thinking, free discussion, and careful reflection on defence, security and geopolitics. Find out more about our thought leadership and convening power.