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 …

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 …

RUSI publications offer rigorous, timely and policy-relevant analysis of UK and international defence and security issues. Leading thinkers and practitioners contribute to RUSI's …

The Royal United Services Institute (RUSI) is an independent think tank engaged in cutting-edge research on defence, security and international affairs.

RUSI publications offer rigorous, timely and policy-relevant analysis of UK and international defence and security issues. Leading thinkers and practitioners contribute to RUSI's …

Jan 8, 2026 · 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 …

Nov 4, 2025 · Matthew Savill, of the Royal United Services Institute (RUSI), said the failure to match other countries’ spending growth risks undermining Britain’s position as a leader in …

Copyright 2026 | The Royal United Services Institute for Defence and Security Studies | RUSI is registered as a charity in England and Wales - Charity number: 210639 | VAT number: …

RUSI is a British institution but operates with an international perspective. Offices in London, Brussels and Nairobi reinforce our global reach.

RUSI conducts research and convenes discussions on the UK’s nuclear weapons programme, its nuclear policy, and its approach to non-proliferation, arms control and disarmament.