His research interests are great power politics, realism, foreign and defense policy in the US and UK, and the causes and consequences of decline.
He has written four books. His book Blunder: Britain’s War in Iraq was shortlisted for the British Army Military Book of the Year Prize, 2019. His most recent book is The False Promise of Liberal Order: Nostalgia, Delusion and the Rise of Trump. He also wrote The Global Village Myth: Distance, War and the Limits of Power and Military Orientalism: Eastern War through Western Eyes.
His work has appeared in journals including International Security, Security Studies, the Journal of Strategic Studies, International Affairs, the Washington Quarterly, The National Interest, Politico, The Critic, The New Statesman, Unherd, the Australian Financial Review, and many others.
He has appeared as an expert witness before the UK’s parliamentary Defence Select Committee, the Foreign Affairs Select Committee, the House of Lords International Relations and Defence Committee, and the Joint Committee on the National Security Strategy.