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 help build a safer and more stable world.
We are the world’s oldest and the UK’s leading defence and security think tank.
Since its foundation in 1831, RUSI has relied on its members to support its activities. Together with revenue from research, publications and conferences, RUSI has sustained its political independence for nearly two centuries.
194
Years of defence and security thought leadership
90+
Active agenda-setting research projects and initiatives
200
Events, conference and workshops ran in 2024
3,800+
RUSI Members support our work
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