Professor Ratti's research and teaching interests lie in post-World War Two international history, specifically U.S.-European relations, NATO’s evolution, European security and defense policies, and international relations theory. Professor Ratti is author of three monographs, two edited volumes and several book chapters. His work has appeared in journals, such as The International History Review, The Journal of Transatlantic Studies, Diplomacy & Statecraft, The Journal of Slavic Military Studies, The Journal of Middle Eastern Geopolitics, and Mediterranean Politics. He is also a Professor of History of International Relations at Rome 3 University. He has been a visiting Professor at Carleton University and a NATO-Schuman Fellow at the University of Mary Washington.
His more recent publications include:
'Italy' in M. Webber and J. Sperling (eds), The Oxford Handbook of NATO (Oxford: OUP, 2025) , 'The enduring relationship between NATO and European integration' in M. Segers and S. Van Hecke (eds), 'The Cambridge History of the European Union' (Cambridge: CUP, 2023), 'Realism', in S. Mayer (ed.), Research Handbook on NATO (Cheltenham: Edward Elgar, 2023), 'NATO and the CSDP after the Ukraine War: The End of European Strategic Autonomy?', Canadian Journal of European and Russian Studies, 16(2), 2023, ‘The Anglo-American special relationship and West Germany’s Eastern policy from ‘bridge-building’ to Ostpolitik’, The International History Review (2020), ‘Reviving Flexible Response: An assessment of NATO’s Russian strategy on the Alliance’s 70th anniversary’, Journal of Slavic Military Studies (2019), ‘Italy and NATO in the 21st century: still a formidable partnership?’ in Michele Testoni (ed.), NATO and Transatlantic Relations in the 21st century: Foreign and Security Policy Perspectives (London and New York: Routledge, 2020) and ‘The EU’s CSDP: The Great Illusion’ in Hubert Zimmerman and Andreas Duer (eds), Key Controversies in European Integration (London and New York: Palgrave/MacMillan, 2021).