Transatlantic Security

A collection of RUSI research exploring different approaches and thinking on the challenges facing Transatlantic security today.



Transatlantic Security

President Donald Trump, right, meets with NATO Secretary General Mark Rutte | Associated Press, Evan Vucci


Overview

The alliances and certainties that have underpinned Western security since the end of the Second World War are under unprecedented strain. The stated US desire to secure control of Greenland, questions over the future of NATO and tariff disputes are all signs of a profound realignment in our international system.

This page includes links to a collection of RUSI outputs that explore different elements of the debate around Transatlantic Security today and the consequences of a United States foreign policy agenda radically different from that pursued over the preceding eight decades.

RUSI’s purpose is undertake research, encourage debate and provide options on critical topics of national and international defence and security. The commentaries, papers, records of media appearances and details of RUSI events collected here are your guide to a debate of critical importance.



  • The UK and Trump’s National Security Strategy

    The UK and Trump’s National Security Strategy

    clock8 Minute Read
  • Trump’s Foreign Policy After Year One: A Look Back, A Look Ahead

    Trump’s Foreign Policy After Year One: A Look Back, A Look Ahead

    clock13 Minute Read
  • Not for Sale – the Kingdom of Denmark Stands its Ground

    Not for Sale – the Kingdom of Denmark Stands its Ground

    clock4 Minute Read

Experts


Rachel Ellehuus

RUSI Director-General

Senior Management

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Jonathan Eyal

Associate Director, Strategic Research Partnerships

RUSI International

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Dr Neil Melvin

Director, International Security

International Security

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Ed Arnold

Senior Research Fellow, European Security

International Security

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Matthew Savill

Director of Military Sciences

Military Sciences

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Oana Lungescu

Distinguished Fellow

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Ambassador Mitchell Reiss

RUSI Distinguished Fellow, RUSI International

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Events & podcasts

View all event recordings

  • Recording: Greenland: The New Battleground in US-Europe Relations

    Recording: Greenland: The New Battleground in US-Europe Relations

    clock60 Minute Watch
  • Recordings: Future of the Euro-Atlantic Security Architecture Conference

    Recordings: Future of the Euro-Atlantic Security Architecture Conference

    clockOne Day Conference
  • Recording: Reflections on the 2025 NATO Summit

    Recording: Reflections on the 2025 NATO Summit

    clock58 Minute Video
Episode 115: Can the Transatlantic Alliance Survive the Trump Presidency?

Episode 115: Can the Transatlantic Alliance Survive the Trump Presidency?

clock57 Minute Listen
Episode 114: How Will German Rearmament Shape European Security?

Episode 114: How Will German Rearmament Shape European Security?

clock53 Minute Listen
Episode 112: A New US Approach to the Caspian Region?

Episode 112: A New US Approach to the Caspian Region?

clock48 Minute Listen

Publications

Access our latest publications and filter by region, research group and by project.

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    Programmes

    Access related projects and programmes

    The Future Euro-Atlantic Security Architecture

    The Future Euro-Atlantic Security Architecture

    Renewing the Transatlantic Alliance for a New Security Era

    Renewing the Transatlantic Alliance for a New Security Era

    Global Security Briefing Podcasts

    Global Security Briefing Podcasts

    European Security in Transformation Programme

    European Security in Transformation Programme

    Shifting Security in Latin America Programme

    Shifting Security in Latin America Programme

    The Middle East, North Africa and Turkey in the New Global Order Programme

    The Middle East, North Africa and Turkey in the New Global Order Programme