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Alexander Wentker

Dr, MJur (Oxford), Maîtr. en droit (Paris II) | Senior Research Fellow

wentker@mpil.de

Main Fields of Research:

Public International Law; German, European, and Comparative Public Law

Academic Career:

  • since 2026 | Postdoctoral Researcher at Humboldt University Berlin
  • since 2025 | Postdoctoral Researcher at the University of Potsdam – Postdoc Network Brandenburg Fellowship of the Ministry for Science, Research, and Culture
  • since 2024 | Senior Research Fellow at MPIL (first in the research group lead by Prof Dr Christian Marxsen, now in the research division of Prof Dr Anne Peters) and book review editor for the Heidelberg Journal of International Law (HJIL/ZaöRV)
  • since 2024 | Habilitation candidate, Humboldt University Berlin
  • since 2024 | Associate Fellow, Chatham House (The Royal Institute of International Affairs, London)
  • 2022 – 2024 | Legal Traineeship (Referendariat) at the Higher Regional Court of Berlin (Kammergericht), 2024 Second Legal State Examination
  • 2018-2022 | Research Fellow/ Senoir Research Fellow – MPIL Research Group "Shades of Illegality in International Peace and Security Law"
  • 2019 - 2022 | doctoral studies in law - University of Oxford; thesis: Party Status to Armed Conflict in International Law
  • 2017 – 2018 | Judicial Clerk – Supreme Court of Namibia, Windhoek
  • 2017 | Intern – United Nations Office for the Coordination of Humanitarian Affairs, New York
  • 2016-2017 | Master (Magister Juris (MJur)) – University of Oxford
  • 2016 | First Legal State Examination
  • 2015 – 2016 | Master (Maîtrise en droit) – Université Paris II – Panthéon-Assas, specialisation in international law
  • 2012 – 2016 | law studies – Humboldt University Berlin
  • 2011 – 2012 | law studies – University of Potsdam, binational Franco-German law program

 

Publications Alexander Wentker (PDF, 254.6 KB)

Recent Publications

  • Extraterritoriale grundrechtliche Schutzpflichten,. In: JuristenZeitung 80, 813-823 (2025) (with Christian Marxsen).
  • Monetary Gold in the Age of Public Interest Litigation. In: European Journal of International Law 36, 559-593 (2025). doi: https://doi.org/10.1093/ejil/chaf044 (with Robert Stendel). open access
  • Digital Empires – An Introduction to the Review Symposium. In: Zeitschrift für ausländisches öffentliches Recht und Völkerrecht 85, 921-929 (2025). doi: DOI 10.17104/0044-2348-2025-3-921 (with Erik Tuchtfeld). open access
  • Verwaltungsgerichtlicher Eilrechtsschutz gegen Rüstungsausfuhrgenehmigungen: strategische Prozessführung und Gewaltenteilung. In: Neue Zeitschrift für Verwaltungsrecht 44, 547-552 (2025).
  • Ausfuhrgenehmigungen vor dem Verwaltungsgericht: Examensklausur Öffentliches Recht. In: Juristische Arbeitsblätter 57, 400-409 (2025).
  • The Armed Attack Exception to Neutrality in Today’s International Peace and Security Law. In: International & Comparative Law Quarterly 73, 963-996 (2024). doi: https://doi.org/10.1017/S002058932400037X. open access
  • „Public Interest“ Verfahren gegen Drittstaaten vor dem Internationalen Gerichtshof – zum Eilrechtsbeschluss in der Rechtssache Nicaragua gegen Deutschland. In: Die Öffentliche Verwaltung 77, 776-782 (2024) (with Robert Stendel).
  • Party Status to Armed Conflict in International Law. Oxford Monographs in International Law. Oxford University Press, Oxford, 2024, 336 p. doi: https://doi.org/10.1093/oso/9780198900900.001.0001 https://academic.oup.com/book/57564
  • Neutrality. In: Research Handbook of Legal Theory and War, Tom Dannenbaum, Eliav Lieblich (eds.). Edward Elgar, Cheltenham 2025, forthcoming. SSRN Preprint
  • Inter-State Assistance in War under International Law. In: German Yearbook of International Law 66, 325-351 (2023) (with Claus Kreß).
  • Identifying co-parties to armed conflict in international law: How and why states, international organizations and armed groups become parties to war. Chatham House Research Paper, 2024 (with contributions from Miles Jackson and Lawrence Hill-Cawthorne). open access
  • At War? Party Status and the War in Ukraine. In: Leiden Journal of International Law 35, 643-656 (2023). open access
  • Kriegspartei? Sicherheitspolitischer Diskurs und Völkerrecht im Ukraine-Krieg. In: DÖV 75, 988-995 (2022).
  • L’assistance d’États tiers dans la guerre d’Ukraine au regard du droit international. In: Annuaire Français de Droit International 68, 173-192 (2022) (with Claus Kreß).
  • Partnered Operations and the Positive Duties of Co-Parites. In: Journal of Conflict & Security Law 27, 159-184 (2022). https://academic.oup.com/jcsl/article/27...
  • Die amerikanische Ausnahme [The American Exception]. In: Frankfurter Allgemeine Zeitung (FAZ), 08.02.2021, p. 15. (with Richard Dören) FAZ
  • Purpose-based regulation of consent to non-forcible interventions. In: Zeitschrift für ausländisches öffentliches Recht und Völkerrecht /Heidelberg Journal of International Law 79, 671- (2019).
  • Nichtteilnahme als Grenzphänomen zwischenstaatlicher Gerichts- und Schiedsverfahren – die Fälle South China Sea und Arctic Sunrise. In: Grenzen des Rechts, Marie-Claire Foblets, Dirk Hanschel, Armin Höland (eds.). Universitätsverlag, Halle-Wittenberg 2018, 39-90.
  • Serdar Mohammed v Ministry of Defence, Appeal judgment [2017] UKSC 2. International Law in Domestic Courts 2803, 2018. https://opil.ouplaw.com/display/10.1093/...

Blogposts

Working Papers

Media

  • Sind die Angriffe auf den Iran völkerrechtlich gedeckt? Alexander Wentker, Völkerrechtler Universität Potsdam. In: Tagesschau24, 23.06.2025. https://www.tagesschau.de/multimedia/vid...
  • Meret Baumann, Nordkorea bricht das Völkerrecht. In: Neue Zürcher Zeitung, 25.11.2024, p. 3. https://www.nzz.ch/international/nordkor...
  • Kristin Kielon, Ist Deutschland auf dem Weg zum Kriegseintritt?. In: MDR Aktuell, 29.10.2024. https://www.mdr.de/nachrichten/podcast/u...
  • Frauke Niemeyer, Wenn die NATO an die Grenze geht. In: n-tv, 28.05.2024. https://www.n-tv.de/politik/Wenn-die-NAT...
  • Charlotte Greipl, Israels Angriff auf Irans Konsulat – Welchen Schutz genießen diplomatische Einrichtungen?. In: Tagesspiegel, 20.04.2024. https://www.tagesspiegel.de/internationa...
  • Interview mit Völkerrechtler Alexander Wentker. In: Bayrischer Rundfunkt (BR24), 14.03.2024. ARD Mediathek
  • Meret Baumann, 'Taurus-Marschflugkörper oder gar Bodentruppen für die Ukraine: Ab wann ist ein Land Kriegspartei?'. In: Neue Zürcher Zeitung, 09.03.2024. https://www.nzz.ch/international/taurus-...
  • Samuel Kirsch, 'Völkerrechtler zu Scholz-Aussage: Kriegseintritt durch Taurus-Lieferungen?'. In: ZDF heute, 28.02.2024. https://www.zdf.de/nachrichten/politik/a...
  • Panzer wichtiger als Wärmepumpen. In: NDR Info (Podcast Streitkräfte und Strategien), 13.06.2023. ARD Audiothek
  • Völkerrechtler: "Nicht Kriegspartei durch Kampfpanzer-Lieferung. In: NDR Info, 26.01.2023. ARD Audiothek
  • Deutsche Kamfpanzer für die Ukraine: 3 Fragen, 3 Antworten’. In: Tagesschau (Instagram), 25.01.2023. https://www.instagram.com/stories/highli...
  • Charlotte Greipl/Jan Henrich, 'Völkerrecht zu Panzerlieferungen: Wann wird man Kriegspartei?'. In: ZDF heute, 24.01.2023. https://www.zdf.de/nachrichten/politik/k...
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  • Carla Reveland/Pascal Siggelkow, 'Hinrichtungen oder vorgetäuschte Kapitulation?'. In: Tagesschau, 22.11.2022. https://www.tagesschau.de/faktenfinder/v...
  • Russische Kriegsverbrechen in der Ukraine. In: 3Sat Kulturzeit, 20.09.2022. https://www.3sat.de/kultur/kulturzeit/ru...
  • Pascal Siggelkow, ‘Zivile Opfer bewusst in Kauf genommen?’. In: Tagesschau, 17.08.2022. https://www.tagesschau.de/faktenfinder/u...
  • Sophie Schuberth et al., ‘Der Kriegsparteistatus: It’s complicated – mit Alexander Wentker’. In: Völkerrechtspodcast, 08.07.2022. https://voelkerrechtsblog.org/de/19-der-...
  • Helene Bubrowski, ‘Was Russland alles nicht darf. Welche Folgen hätte ein Eintritt Deutschlands in den Ukrainekrieg?’. In: Frankfurter Allgemeine Zeitung, 16.05.2022, p. 10.
  • Interview: "Waffenlieferungen und Ausbildung: Sind wir jetzt Kriegspartei?". In: FAZ-Einspruch Podcast, 04.05.2022. (with Helene Bubrowski) https://www.faz.net/podcasts/f-a-z-einsp...
  • Interview: "Kriegspartei zu werden ist nicht per se verboten". In: Rhein-Neckar-Zeitung, 10.05.2022, p. 17. https://www.rnz.de/politik/hintergrund_a...

Presentations

10 Sep 2025

Eroding the Consent Principle? Findings in Advisory Opinions as ‘Givens’ in Contentious Cases

European Society of International Law, Annual Conference, FU Berlin – Pre-Conference Workshop International Courts and Tribunals, with Robert Stendel

03 Jul 2025 - 04 Juli 2025

Comparative International Legal Policy: National, Regional and Transnational Approaches (Paper Discussant and Panel Chair)

HU Berlin

26 Jun 2025

Party Status to Armed Conflict in International Law

International Society for Military Law and the Laws of War – UK Branch, online

22 May 2025

Hybrid Threats and Emerging Technology: A Constitutional Law Perspective

German Council on Foreign Relations [DGAP], Berlin

18 Dec 2024

Monetary Gold in the Age of Public Interest Litigation: The Indispensable Third Party Principle at 70

Hebrew University Jerusalem – online, with Robert Stendel

25 Nov 2024

Monetary Gold in the Age of Public Interest Litigation: The Indispensable Third Party Principle at 70

University of Bristol Law School, with Robert Stendel

22 Nov 2024

Book launch: Party Status to Armed Conflict in International Law

University of Oxford, All Souls College, with Dapo Akande, Miles Jackson, Marko Milanovic, Philippa Webb and Elizabeth Wilmshurst

19 Nov 2024

Who is at War? Establishing Party Status and its Meaning in International Law

University of Virginia Law School

15 Nov 2024

Monetary Gold at 70 – Re-envisaging Multilateralism in International Courts?

American Society of International Law, Mid-Year Meeting, University of Chicago Law School, with Robert Stendel

21 Oct 2024

The International Court of Justice and World Public (Dis)Order: Public Interest Litigation and the Multilateralization of International Dispute Settlement

Max Planck Law Conference, Berlin, panel organisation and presentation, with Robert Stendel

10 Oct 2024

Party Status to Armed Conflict in International Law

University of Copenhagen (iCourts)

26 Sep 2024

Monetary Gold at 70: Re-visioning Multilateralism in International Courts

ICON-S Germany, Third Conference, ‘(Re)Vision’, University of Mannheim, with Robert Stendel

23 Sep 2024

Party Status to Armed Conflict in International Law

MPIL Heidelberg

08 Jul 2024

The ICJ’s Provisional Measures Order in Nicaragua v. Germany

MPIL Heidelberg (with Robert Stendel)

29 Jun 2024

Der Internationale Gerichtshof und die Gewährleistung von Frieden und Sicherheit durch die Vereinten Nationen

University of Potsdam (15th UN Conference)

05 Jun 2024

Comparative International Legal Policy: National Political Approaches towards International Legal Order (Panel Moderation)

HU Berlin

03 May 2024

Joining in Wars – Identifying Parties to Armed Conflict

NATO Office of Legal Affairs

21 Nov 2023

Use of force and complicity

MPIL Heidelberg

11 Nov 2023

Neutrality and Aggression in the Contemporary International Law of Peace and Security

American Society of International Law (Midyear Meeting, University of Pittburgh Lawschool)

08 Nov 2023

Co-Parties to Armed Conflict in International Law – Legal Implications and Practical Recommendations

Chatham House – The Royal Institute of International Affairs, London

24 Apr 2023

Changing Perceptions of the Use of Force

European Society of International Law (Research Forum, Tartu)

11 Jan 2023

Legal Criteria for Identifying Co-Parties to Armed Conflict in International Law

Chatham House – The Royal Institute of International Affairs, London

06 Dec 2022

Wer wird Kriegspartei? Militärische Unterstützung im politischen Diskurs und Völkerrecht [Who becomes a belligerent? Military assistance in political discourse and international law]

Württembergische Landesbibliothek, Stuttgart

14 Nov 2022

At War? Party Status and the War in Ukraine

Minerva Centre Conference on the War in Ukraine, Hebrew University Jerusalem

22 Sep 2022

Der Konfliktparteistatus im Völkerrecht [Party Status to Armed Conflict in International Law]

German Society for Military Law and the Laws of War, Freie Universität Berlin

16 Jun 2022

Völkerrechtsbruch und Völkerrechtsordnung: Implikationen und Perspektiven der gegenwärtigen Krise (in German)

Berlin-Brandenburg Academy of Sciences and the Humanities - Workshop with the German Federal Foreign Office

22 Mar 2022

Neutrality, Use of Force, and Party Status in the Russian War of Aggression against Ukraine

MPIL Heidelberg

24 Sep 2021

Partners as Co-Parties

Università La Sapienza, Rome (conference on Partnered Operations in International Law, European Society of International Law and American Society of International Law) programme

23 Sep 2021

Peace, peace operations, and safe zones (Panel Moderation)

MPIL Heidelberg, Conference on Contested Norms of International Peace and Security Law

01 Jul 2019

The Rukoro Case – Germany's colonial atrocities before US courts and issues of State immunity

Max Planck Institute for Comparative Public Law and International Law, Heidelberg (with Richard Dören)

12 Nov 2018

The International Court of Justice's Provisional Measures Order in the Treaty of Amity case (Iran v US)

Max Planck Institute for Comparative Public Law and International Law, Heidelberg

14 Sep 2018

Ist Krieg ein Weg zum Frieden? (Panel Diskussion mit Christian Marxsen, Paulina Starski, Carolyn Moser und Alexandra Kemmerer)

Max Planck Day 2018, Max-Planck-Institut für ausländisches öffentliches Recht und Völkerrecht, Heidelberg

Teaching

WS 2025/26

Übung Internationales Recht (Vertretung Professor Dr. Andreas Zimmermann)

University of Potsdam

WS 2025/26

Verfassungsrechtliches Kolloquium

University of Heidelberg (with Robert Stendel, Claudia Hainthaler, Robert Pracht, Jannika Jahn, and Richard Dören)

SoSe 2025

Universitätsrepetitorium: Öffentliches Recht – Staatsrecht III

HU Berlin (with Dimitri Spieker)

SoSe 2025

International Dispute Settlement

FU Berlin (lectureship, with Robert Stendel)

SoSe 2025

Völkerrechtliches Kolloquium

University of Heidelberg (with Jannika Jahn and Malcolm Jorgensen)

WS 2024/25

Universitätsrepetitorium: Examensklausurenkurs – Klausur Öffentliches Recht Nr. 6

University of Potsdam

WS 2024/25

Übung Internationales Recht (Vertretung Professor Dr. Andreas Zimmermann)

University of Potsdam

WS 2024/25

Universitätsrepetitorium: Examensklausurenkurs II – Klausur Öffentliches Recht (HK 690)

University of Heidelberg

WS 2024/25

Verfassungsrechtliches Kolloquium

University of Heidelberg (with Robert Stendel, Claudia Hainthaler, Robert Pracht, and Jannika Jahn)

SoSe 2024

Öffentliches Recht II - Besonderes Verwaltungsrecht (AG)

HU Berlin

SoSe 2024

Colloquium in International Law

Universität Heidelberg (with Jannika Jahn and Malcolm Jorgensen)

WS 2023/24

International Dispute Settlement

FU Berlin (lectureship, with Robert Stendel)

SoSe 2022

International Dispute Settlement

FU Berlin (Lectureship, with Robert Stendel)

SoSe 2021

International Dispute Settlement

FU Berlin (Lectureship, with Robert Stendel)

WS 2020/21

International Dispute Settlement

FU Berlin (lectureship, with Robert Stendel)

SoSe 2019

International Dispute Settlement

FU Berlin (lectureship, with Robert Stendel)

Honours

2025 | Francis Lieber Prize of the American Society of International Law

2025 | Early Career Prize, International & Comparative Law Quarterly, Cambridge University Press (Article Prize)

2023 | German Thesis Award of the Körber Foundation (Second Prize, Arts and Humanities Section)

2022 | Helmuth-James-von-Moltke Prize of the German Society for Military Law and the Laws of War

2019 - 2022 | German National Academic Foundation (doctoral scholarship) 

2019 - 2022 | Clarendon Scholarship, University of Oxford

2017 - 2018 | Oxford Bonavero Fellowship 

2017 | Oxford Global Justice Fellowship 

2017 | Clifford Chance Prize Proxime Accessit (for the second best overall performance in the MJur Oxford)

2017 | Law Faculty Prize International Law and Armed Conflict of the University of Oxford

2016 & 2017 | Law Faculty Prizes of Humboldt-Universität (First Legal State Examination and Specialization)     

2017 | Brasenose College Prize (Oxford)

2016 – 2017 | Haniel Scholarship of the German National Academic Foundation and the Haniel Foundation 

2016 – 2017 | German Academic Exchange Service [DAAD] LLM scholarship

2013 – 2014 | Studienkolleg zu Berlin fellowship

2011 – 2017 | German National Academic Foundation scholarship

Miscellaneous

Languages

 German, English, French, Italian, Spanish, Russian