International law and its science, 1789-1914

Project leader: Prof. em. Dr. Dr. h.c. mult. Michael Stolleis

The project examined paradigmatic changes in legal structures in international relations in the 19th and early 20th centuries. Both international law practice and international law scholarship were of interest. The aim was to understand international law as a separate type of normative order in an interdisciplinary research context and to analyze its historical structural features: What goals and values constituted international law in the 19th century? Who were the actors and what legal instruments did they use? In what form did global norms and orders become universalized?

As a result, it emerged that international structures underwent a remarkable development during the research period: Between the end of the Ancien Régime and the outbreak of the First World War, international law developed from a law of coexistence to a law of cooperation. New international regimes were established to regulate diverse political, social and economic interests, and relations between states became more legalized; at the same time, however, there were also areas in which legal avoidance dominated (sovereign debt; right of intervention). Principles that are still valid today, such as the fundamental rights of states or the international community, emerged. Intergovernmental organizations began to shape international relations. In the process, both a separation of international law from morality and the adoption of fields of activity that signify a “moralization” of law can be observed.

This change in the practice of international law was accompanied, promoted and reflected by numerous scholars of international law. In addition to individual authors, of whom Georg Friedrich von Martens, Theodor Schmalz, Julius Schmelzing, Friedrich Saalfeld, Carl Baron Kaltenborn von Stachau, Robert von Mohl, Henry Wheaton, August Wilhelm Heffter, August von Bulmerincq, Carl Bergbohm, Johann Caspar Bluntschli, Leopold Neumann, James Lorimer, William Edward Hall, Fedor Fedorowitsch von Martens, Carlos Calvo, Henry Bonfils, Franz von Liszt, John Westlake, Frantz Despagnet and Lassa Oppenheim should be mentioned, the founding of the Institut de Droit International in particular testifies to the importance and influence of science on the newly invented system of international law.

A particular concern of the project group’s research was the analysis of the academic accompaniment of the juridification process by the authors of international law and political science: they commented on the institutionalizations that took place in the course of the 19th century and accompanied the processes of negotiating an international normative order in their contemporary interpretations and historical narratives. In doing so, they often developed affirmative, rarely alternative concepts of order. The question of universalist claims to justice in a world order, whether based on the morality of nations or the demand for equal treaties through to the resolution of state bankruptcies, which took place in and through international law, emerged as an aspect of this, as did the emergence and establishment of general legal principles of international law, taking into account contemporary academic discourse.

The results are available in the form of several monographs and anthologies. The most important of these include
Nuzzo, Luigi/Vec, Miloš (eds.) (2012): Constructing International law – The Birth of a Discipline (Studien zur europäischen Rechtsgeschichte 273), Frankfurt/M.: V. Klostermann, XVI, 545 pp.
Heimbeck, Lea (2013): The resolution of state bankruptcies in international law. Legalization and legal avoidance between 1824 and 1907 (Studies in the History of International Law), Baden-Baden: Nomos.
Stefan Kroll (2012): Norm genesis through re-interpretation. China and European international law in the 19th and 20th centuries (Studies in the History of International Law 25), Baden-Baden: Nomos.
Klump, Rainer/ Vec, Miloš (eds.) (2012):International Law and the World Economy in the 19th Century (Studies in the History of International Law 26), Baden-Baden: Nomos, VII, 271 pp.
Lovric-Pernak, Kristina (2013): Morale internationale and humanité in international law of the late 19th century. Meaning and function in state practice and science (Studies in the History of International Law 30), Baden-Baden: Nomos, 200 pp.

The most important events in the research project include
“Storia teoria e diritto internazionale. La costruzione di una disciplina”, International Conference, Lecce (Italy) May 20-22, 2009, “Völkerrecht und Weltwirtschaft im 19. Jahrhundert. Die Internationalisierung der Ökonomie aus völkerrechts- und wirtschafts(theorie-)geschichtlicher Perspektive”, Workshop, 3-4 September 2009 in Frankfurt am Main, Max Planck Institute for European Legal History and “The Emergence and Transformation of Foreign Policy.” International Conference, Johns Hopkins University, Bologna, June 10-12, 2011.

Further information at: https://www.rg.mpg.de/forschung/voelkerrechtsgeschichte

News from the research center

Publication
19.08.2026 | Anthology

Sokrates revised and revisited

Bohl, Judith K.; Brandis, Veronika; Pfeifer, Guido (Hrsg.) (2026): „Sokrates revised and revisited. Überlieferung, Diskurs, Inszenierung“. Heidelberg: Propylaeum. 

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Publication
14.08.2026 | Chapter

Vom rechtshistorischen Erkenntniswert antiker Tragödiendichtung: Überlegungen anhand Euripides’ Medeia

Pfeifer, Guido (2026): "Vom rechtshistorischen Erkenntniswert antiker Tragödiendichtung: Überlegungen anhand Euripides’ Medeia". In: Gsell, Beate; Rüfner, Thomas; Babusiaux, Ulrike (Hrsg.): Die unverzichtbare Wissenschaft – The Indispensable Science, Mohr Siebeck, S. 663-671.

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Publication
01.08.2026 | Chapter

"Das Andere in uns selbst" (Marcel Gauchet). Das Ideal gesellschaftlicher Autonomie und die Denkfigur der Alterität

Langner-Pitschmann, Annette (2026): „Das Andere in uns selbst“ (Marcel Gauchet). Das Ideal gesellschaftlicher Autonomie und die Denkfigur der Alterität. In: Schlette, Magnus et. al. (Hrsg.): Ordnung im Übergang Zur Funktion von Transzendenzbezügen in der Konstitution und Transformation politischer Gemeinschaft, Tübingen: Mohr Siebeck, S. 185-205.

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Event
24.09.2026 | Frankfurt am Main

Die neuen Warlords. Gewaltdynamiken einhegen / Friedensgutachten 2026

Book Presentation

Die imperialistische Großmachtpolitik ändert die Vorzeichen von Krieg, Frieden und Sicherheit. Staaten agieren zunehmend wie Warlords und setzen Krieg als Mittel der Politik ein. Übergänge von Gewaltkonflikten zu Frieden werden als „Deals“ behandelt, Mittelmächte treten mit neuem Selbstbewusstsein, aber ambivalentem Kurs auf, und technologische Innovation verändert Kriege und erschwert die Regulierung. Zugleich befindet sich die internationale Kooperation in der Friedenssicherung in ihrer schwersten Krise. Das Friedensgutachten 2026 analysiert Optionen, dennoch Frieden zu fördern.

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Publication
23.07.2026 | Journal article

Governing the Subject of Populism

Biebricher, Thomas: "Governing the Subject of Populism". In: European Journal of Social Theory, OnlineFirst.

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Publication
15.07.2026 | Monograph

Das Recht der Gewalt. Warum Waffen allein keinen Frieden schaffen

Simon, Hendrik (2026): Das Recht der Gewalt. Warum Waffen allein keinen Frieden schaffen. Ditzingen: Reclam.

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Publication
10.07.2026 | Anthology

Schnittstellen im Gesundheitsrecht

Kießling, Andrea (Hrsg.) (2026): „Schnittstellen im Gesundheitsrecht“. Nomos.

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News
19.06.2026

International symposium honours the lifework of Jürgen Habermas

On Friday 19 June 2026, the Research Centre Normative Orders, in collaboration with Suhrkamp Verlag, paid tribute to the late Jürgen Habermas with an international symposium at Goethe University Frankfurt.

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Publication
13.06.2026 | Monograph

Identitätsbasierte Führung: Vom ICH zum WIR. Als Führungskraft gesunde und leistungsstarke Gruppen, Teams und Organisationen fördern

van Dick, Rolf; Kratzer, Benedik E., Steffens, Niklas K., Kerschreiter, Rudolf (2026): „Identitätsbasierte Führung: Vom ICH zum WIR. Als Führungskraft gesunde und leistungsstarke Gruppen, Teams und Organisationen fördern“. Springer Berlin.

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