Dr Iacovos Kareklas, Visiting Fellow at the Changing Character of War Centre (CCW), presents a strongly argued thesis that there is a legal and moral right to unilateral humanitarian intervention which dates back to the Peloponnesian War. The presented paper adopts a fresh approach on unilateral humanitarian intervention, and purports to demonstrate that, in certain cases, not only is permissible, but also legally and morally imperative. This academic venture is predominantly based on authoritative state practice, which in the view of the author should constitute reliable international legal custom, as well as theoretical groundwork; namely the well-established notion that violation of human rights necessitates intervention for the restoration of moral order, and applicable theories of deterrence (and just retribution) rendering humanitarian military intervention unobjectionable on grounds of the possibility of imminent humanitarian catastrophes. Iacovos Kareklas got his B.A. and M.A. Degrees (Honours) in Law from Cambridge University, Magdalene College. He holds a Ph.D. in International Law from London University (London School of Economics and Political Science). He specialized in all fields of Public International Law and every aspect of the Cyprus problem. He conducted sustained and in depth research in the United Kingdom Foreign Office Archives with regard to the critical phases of the Cyprus Question. In the academic year 2003-2004 he was a Postdoctoral Fellow at the Department of Government, Harvard University. He did postdoctoral studies in International Relations Theory with special reference to the Use of Military Force under the worldwide distinguished political scientist, Professor Stanley Hoffmann. At Harvard, he also taught the course Classical Theories of International Relations. In the year 2004-2005, Dr. Kareklas was appointed Postdoctoral Fellow at Harvard’s Center for Middle Eastern Studies. In 2006 and 2007 he was elected Fellow of the Faculty of Law in the University of Oxford, where he specialized in the Philosophy of Law. From 2013 to 2020 he was Associate Professor at the European University Cyprus, where he taught Public International Law, Jurisprudence, Constitutional Law, and International Politics. He spent a year as researcher in the Institute of Commonwealth Studies (ICS) of London (2001-2002), the British Institute of International and Comparative Law (2003), the Oxford Centre for Criminology (2006), and has been a member of the Royal Institute of International Affairs. Iacovos is the author of numerous books and articles in the fields of his specialization. His latest book entitled Thucydides on International Law and Political Theory was published in New York by Rowman and Littlefield: Lexington Books, in 2020. As a Visiting Research Fellow at CCW, he is conducting further research on the Law of War with emphasis on military humanitarian intervention.