The author of this post is Massimo Benedettelli, formerly a Professor of International law at the University of Bari “Aldo Moro”.
One of the leading jurists of the twentieth century has passed away. If the Italian academic tradition requires all international law professors to be versed in conflicts and the law of nations at once, Paolo Picone can be considered one of the few scholars in the world who were true masters in both disciplines, having developed groundbreaking and original analytical perspectives on all the topics he elected to study during his almost fifty-year career.
Indeed, his works on erga omnes obligations demonstrated how the international community may protect fundamental values and collective interests of humanity by laying down obligations that States do not owe vis-à-vis each other but rather towards the international community as a whole, every State being entitled to act uti universi for their enforcement as if it were a de facto organ.
His holistic analysis of the network of post-WWII treaties, multilateral organisations, and other instruments which, from Bretton Woods onwards, regulate the global flow of goods, services, and capital enabled him to posit that the international community is endowed with its own “economic constitution” governing inter-State economic relations on the basis of a uniform set of basic principles.
Turning to private international law, he was the first to highlight that contemporary legal systems coordinate with each other in the regulation of cross-border private matters using a plurality of methods that are radically different in terms of their function, structure, and theoretical foundation.
Born in Naples in 1940, Paolo Picone graduated in law in 1963 from the local University “Federico II” with the highest marks. From 1963 to 1969 he served as assistant to the chair of Rolando Quadri, one of the “founding fathers” of the Italian school of international law, being the junior member of a team which included jurists of the caliber of Benedetto Conforti (later a judge at the European Court of Human Rights), Luigi Ferrari-Bravo (later a judge at the International Court of Justice), and Antonio Tizzano (later a judge at the European Court of Justice).
Notwithstanding having scored first in the bar exam in 1966 and being awarded the Toga d’oro prize, he decided not to practice law (something for which he showed no interest throughout his entire life) but to pursue an academic career, where he quickly advanced.
Having obtained the habilitation in 1969, he was appointed full professor (professore ordinario) in 1975, holding the chair of International Law first at the Faculty of Law of the University of Bari “Aldo Moro” (1976–1980), then at the Faculty of Economics of the University of Naples “Federico II” (1981–1998), and finally at the Faculty of Law of the University of Rome “La Sapienza” (1999), where he became Director of the Institute of International Law and, upon retirement, was awarded the title of emeritus.
A visiting professor at the Free University of Berlin-West (1971), the Faculty of Law of the University of Paris I – Sorbonne (1983), and the Faculty of Law of the University of Hamburg (1987), he carried out long periods of research and study stays in other institutions, such as the Free University of Berlin-West, the NYU Law School, and the Max Planck Institutes in Heidelberg and Hamburg.
He participated in, and for some years led, the Italian delegation to the Hague Conference on Private International Law, where he actively cooperated with the works of the sessions held in 1984, 1988, 1993, and 1996.
In recognition of his worldwide reputation, he was made a member in 2001 of the Institut de droit international and in 2006 of the Accademia Nazionale dei Lincei, one of the oldest and most reputable Italian scientific institutions.
His first monograph (1969), a 667-page book on the complex issue of special conflict-of-laws rules regulating the prerequisites for the application of substantive norms, was praised for its innovative analysis by scholars of the standing of Leo Raape and Fritz Sturm and earned him an invitation from Wilhelm Wengler to serve as his research associate at the Free University of West Berlin. This led to co-editing with Wengler the anthology Internationales Privatrecht, published in 1974 in the prestigious Wege der Forschung series.
His subsequent books on a divorced foreigner’s capacity to marry (1970), the relationship between private international law rules and substantive rules of the forum (1971), and the formal structure of the problem of preliminary questions (1971) were reviewed in Rabels Zeitschrift and other journals, strengthening his international reputation.
While continuing his public international law studies (in 1973 he published a book on the provisional application of treaties, elaborating the original category of international agreements which are “juridical but not binding”), the first phase of Paolo Picone’s career saw him mostly focused on private international law.
On the correct premise that “laws” should not be conflated with “legal systems”, and that private international law does not only deal with conflict-of-laws issues since questions of international jurisdiction and recognition of foreign judgments are also essential for its coordination purposes, he identified a peculiar private international law technique, which he named the “method of the reference to the competent (foreign) legal system”. This became the subject-matter of the course he was invited to give at The Hague Academy of International Law in 1984, which was then published in the Recueil two years later.
This original and innovative perspective led him to identify two other private international law methods – one based on alternative conflict rules inspired by “material” considerations and one contemplating the generalized application of the lex fori (or “jurisdictional approach”) – which he proved to exist in positive law, alongside the “traditional” Savignyian method of the localisation of factual situations and the newly discovered method of the reference to the competent legal system.
In numerous writings, the characteristics of these four different methods, the different answers they give to classic issues of “general theory”, and their interplay, also as a result of party autonomy, were first tested in light of the 1995 reform of Italian private international law, then examined from a comparative law perspective, and finally presented in the General Course of Private International Law which Paolo Picone delivered at The Hague Academy in 1999. Today, Les méthodes de coordination entre ordres juridiques en droit international privé (Recueil des Cours, 1999) remains a fundamental reading for anyone who wants to approach the study (and practice) of private international law in a rigorous, non-amateurish way.
In 2004, he edited a book on the EU harmonisation of the Member States’ private international law – a phenomenon which, to put it gently, he did not support with enthusiasm due to the lack of a systematic approach and theoretical grounding which he believed characterized the action of the EU legislator – where he noted that the four different private international law methods he had devised were also operating at the EU level (probably unbeknownst to the Brussels institutions).
This was Paolo Picone’s last contribution to private international law scholarship. Thereafter, he mostly focused on public international law, studying through the lens of obligations erga omnes matters as different as environmental law, aggression and other international crimes, authorisations to the use of force by the UN Security Council, State responsibility, jus cogens norms, and international criminal courts.
This résumé of Paolo Picone’s contribution to the science of (public and private) international law would be incomplete without mention of the book reviews he routinely published throughout his life in the Rivista di diritto internazionale and other legal journals. Young scholars in search of inspiration for new areas of research are strongly advised to consider them. In fact, in both dimensions and content, they are not really book reviews in the traditional sense but rather “mini-articles” which Paolo Picone used as an occasion to start indirect debates with the reviewed author (a famous one was entertained with Pierre Mayer) and to synthesize ideas and suggestions for future studies on a wide range of topics.
Throughout a career that spanned more than forty years, Paolo Picone trained countless students and was a generous mentor to many generations of scholars, even those not belonging to his “school”, whom he helped enter academia and develop their careers.
A true Neapolitan in love with his hometown, he combined subtle irony with a strong character, often harsh and unconventional. Because of this character, he may not have received all the rewards that his genius and exceptional talent warranted. However, his name will remain in the history of international law.
At a time when sovereigntism construes international law only on bilateral “contractualist” terms (if not going so far as to challenge its very existence) and asserts the alleged supremacy of the law of the forum, Paolo Picone’s scholarship will continue to offer fundamental tools to those who wish to defend the idea of an international community governed by the rule of law and where legal values circulate among nations.

‘Speaks 13 languages, can tell a joke in 7, can lecture in 8.’ This was the headline of a 2015 article in the Slovenian newspaper Dnevnik, marking the third appointment of Marko Ilešič as the Slovenian judge at the Court of Justice of the European Union. Indeed, being a polyglot was one of Judge Ilešič’s many remarkable traits, but it was far from the only one that earned him admiration and respect from all who had the privilege of meeting and working with him. The readers of this blog will remember him for his role in shaping CJEU case law in various areas of Private International Law, often as juge rapporteur. A particularly touching recent memory for many of us is his presiding over the panel in the finals of this year’s PAX Moot held in April.
Erik Jayme passed away on 1 May 2024, just five weeks before his expected celebration of his ninetieth birthday.
The editors of the blog of the European Association of Private International Law are sad to learn of the passing away of Erik Jayme. He would have turned 90 in a few weeks.
The European Association of Private International Law mourns the loss of
The European Association of Private International Law learnt with great sadness the passing of Peter Mankowski. The editors of the EAPIL Blog are most grateful to Ulrich Magnus for contributing the in memoriam published earlier today.
In retrospect, it was only logical that Peter Mankowski would be interested in sharing and debating with other European scholars.