SCGA Team: Christian J. Tams

Christian J. Tams

Chair, International Law, University of Glasgow

Christian J. Tams is Professor of International Law at the University of Glasgow, where he directs the Glasgow Centre for International Law and Security (GCILS). He studied and worked in Germany before coming to Scotland in 2008.

He is an expert on questions of in international law and has e.g. published on the legal rules governing recourse to military force, on the role of international courts, and on investment protection. In addition to his academic work, Christian  regularly advises States, individuals and companies in disputes before international courts. He sits on the Board of the European Society of International Law and of the editorial board of the European Journal of International Law.

He is a long-suffering supporter of a once-mighty football club, the Hamburger Sport-Verein.

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Press, Clips, Interviews

“The major football associations exclude Russia. But do they even have the right to punish teams and players for the actions of the state and its political leadership in violation of international law?”. 

GCILS Director, Professor Christian J Tams signed a declaration, sponsored by former Prime Minister of the United Kingdom, Gordon Brown, and his wife, Sarah Brown, calling for the creation of a special tribunal for the punishment of the crime of aggression against Ukraine.

Statement by Members of the International Law Association Committee on the Use of Force.

Statement by the President and the Board of the European Society of International Law on the Russian Aggression against Ukraine.

To mark the 20th anniversary of the most widely used document in international law, we are publishing a special new Working Paper, ’The ILC Articles at 20′, bringing together contributions to an @ejiltalk symposium published in August:


Schill, S. W., Tams, C. J. and Hofmann, R. (2018) Oceans and space: new frontiers in investment protection? Journal of World Investment and Trade, 19(5-6), pp. 765-774. (doi: 10.1163/22119000-12340119)

Tams, C. (2018) Legacy of the League of Nations. Soochow Law Journal, 15(2), pp. 217-223.

Tams, C. J. (2018) Three questions about “informal regulation”. AJIL Unbound, 112, pp. 108-112. (doi: 10.1017/aju.2018.40)

Tams, C. (2017) Embracing the uncertainty of old: armed attacks by non-state actors prior to 9/11. Zeitschrift für ausländisches öffentliches Recht und Völkerrecht, 77,

Tams, C. J. (2016) State succession to investment treaties: mapping the issues. ICSID Review: Foreign Investment Law Journal, 31(2), pp. 314-343. (doi: 10.1093/icsidreview/siw006)

Tams, C. J. (2015) EJIL editor’s choice of books 2015. European Journal of International Law, 26(4), pp. 1033-1035. (doi: 10.1093/ejil/chv069)

Tams, C. J. (2015) Meta-custom and the court: a study in judicial law-making. Law and Practice of International Courts and Tribunals, 14(1), pp. 51-79. (doi: 10.1163/15718034-12341285)

Tams, C. J. (2014) Editor’s book choices 2014. European Journal of International Law: Talk! [blog],

Kress, C. and Tams, C. J. (2014) Wider die normative Kraft des Faktischen: Die Krim-Krise aus völkerrechtlicher Sicht. Internationale Politik(3), pp. 16-19.

Tams, C. J. (2014) Procedural aspects of investor-state dispute settlement: the emergence of a European approach? Journal of World Investment and Trade, 15(3-4), pp. 585-611. (doi: 10.1163/22119000-01504012)


O’Connell, M. E., Tams, C. J. and Tladi, D. (2019) Self-Defence against Non-State Actors. Series: Max Planck trialogues. Cambridge University Press: Cambridge. (doi:10.1017/9781108120173)

Tams, C. J. , Berster, L. and Schiffbauer, B. (2014) Convention on the Prevention and Punishment of the Crime of Genocide. Beck: München. ISBN 978406603174

Tams, C.J. (2010) Enforcing Obligations Erga Omnes in International Law. Revised edition. Series: Cambridge studies in international and comparative law (44). Cambridge University Press: Cambridge. ISBN 9780521128896

Behring, J., Braun, T.R., Lorz, R.A., Tams, C. , Schill, S. and Tietje, C. (2009) General Public International Law and International Investment Law: A Research Sketch on Selected Issues. Beiträge zum Transnationalen Wirtschaftsrecht. International Law Association German Branch – Sub-Committee on Investment Law, Halle, 2009: Halle.

Tams, C.J. (2006) An Appealing Option?: The Debate about an ICSID Appellate Structure. Series: Beiträge zum transnationalen Wirtschaftsrecht (57). Inst. für Wirtschaftsrecht: Halle, Germany. ISBN 9783860108437

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The Cambridge Companion to the ICJ is a dream come true. Many thanks to my co-editor @KateParlett and all the fantastic authors of the book. #icj @niluferoral @KohenMarcelo @achehtman1 @federica_paddeu @AntonioRemiro @tomginsburg @bodanskydm @JdA_IntLaw…

The Cambridge Companion to the International Court of Justice by Carlos Esposito, Kate Parlett - @carlos_dem @KateParlett
A readable, in-depth study of the role of the International Court of Justice, its practice, and the impact of its jurisprudence.

Join us for the virtual launch of the latest @esil_sedi @OUPLaw book on 'Secondary Rules of Primary Importance‘ tomorrow (6 March, 4pm CET) with @VeronikaFikfak , Marko Milanovic, Gabor Kajtar and Katalin Sulyok — registration at……

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Katalin Sulyok, one of the chapter authors, is one of the participants in the virtual book launch next Monday. 💡

The Franco-German University (@DFHUFA), with the support of the Academy, is pleased to invite you to the event "Franco-German Dialogue for Peace and Justice", which will take place on June 9th, 2023. Register before April 16th via the following link:…