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To what extent, comparatively, might changes in international law constrain the use of the military instrument of power by Russia, China, and UK in the 2020s and 2030s? (2024)
Report
Green, J. A. (2024). To what extent, comparatively, might changes in international law constrain the use of the military instrument of power by Russia, China, and UK in the 2020s and 2030s?. Secretary of State’s Office for Net Assessment and Challenge (SONAC), Ministry of Defence, United Kingdom of Great Britain and Northern Ireland

This report was commissioned and funded by the Secretary of State’s Office for Net Assessment and Challenge (SONAC), Ministry of Defence, United Kingdom of Great Britain and Northern Ireland. As was requested by SONAC, it seeks to predict possibl... Read More about To what extent, comparatively, might changes in international law constrain the use of the military instrument of power by Russia, China, and UK in the 2020s and 2030s?.

Collective Self-Defence in International Law (2024)
Book
Green, J. A. (2024). Collective Self-Defence in International Law. Cambridge: Cambridge University Press. https://doi.org/10.1017/9781009406420

Collective self-defence can be defined as the use of military force by one or more states to aid another state that is an innocent victim of armed attack. However, it is a legal justification that is open to abuse and its exercise risks escalating co... Read More about Collective Self-Defence in International Law.

Collective self-defence and the criterion of a request for aid (2023)
Presentation / Conference
Green, J. A. (2023, September). Collective self-defence and the criterion of a request for aid. Paper presented at International Law and the Regulation of Resort to Force: Exhaustion, Destruction, Rebirth?, Faculty of Law, Palacký University Olomouc, Czech Republic

The provision of weapons and logistical support to Ukraine and the jus ad bellum (2023)
Journal Article
Green, J. A. (2023). The provision of weapons and logistical support to Ukraine and the jus ad bellum. Journal on the Use of Force and International Law, 10(1), 3-16. https://doi.org/10.1080/20531702.2023.2200321

This editorial considers the support currently being supplied to Ukraine following Russia’s ongoing full-scale invasion, which began in February 2022. Western states have provided significant aid to Ukraine in the form, inter alia, of modern weapons... Read More about The provision of weapons and logistical support to Ukraine and the jus ad bellum.

‘Twiplomacy’ and the making of customary international law on social media (2023)
Presentation / Conference
Green, J. (2023, April). ‘Twiplomacy’ and the making of customary international law on social media

In recent years, there has been a huge rise in ‘twiplomacy’: that is, the use of social media as a means of direct diplomatic communication by states. This paper examines whether social media posts by states can contribute, directly and in themselves... Read More about ‘Twiplomacy’ and the making of customary international law on social media.

The nature of the request requirement for collective self-defence (2023)
Presentation / Conference
Green, J. (2023, March). The nature of the request requirement for collective self-defence

The right of collective self-defence has been invoked more by states over the last 10 years than at any other point in the UN era – including it forming one of the (spurious) justifications advanced by Russia for its 2022 invasion of Ukraine. Most of... Read More about The nature of the request requirement for collective self-defence.

Military assistance on request and collective self-defence (2022)
Presentation / Conference
Green, J. (2022, June). Military assistance on request and collective self-defence. Presented at International Law Association Biennial Conference, Lisbon, Portugal

The concepts of military assistance on request (or ‘intervention by invitation’) and collective self-defence are, in some respects, strikingly similar. They both involve a prima facie unlawful use of force by one state, undertaken at the request of... Read More about Military assistance on request and collective self-defence.

Russia’s attack on Ukraine and the jus ad bellum (2022)
Journal Article
Green, J. A., Henderson, C., & Ruys, T. (2022). Russia’s attack on Ukraine and the jus ad bellum. Journal on the Use of Force and International Law, 9(1), 4-30. https://doi.org/10.1080/20531702.2022.2056803

The 24 February 2022 Russian invasion of–or ‘special military operation’ in–Ukraine has sent shock waves across the globe. In this editorial the Editors-in-Chief of JUFIL examine in detail the legal justifications advanced by President Putin for Russ... Read More about Russia’s attack on Ukraine and the jus ad bellum.

The rise of twiplomacy and the making of customary international law on social media (2022)
Journal Article
Green, J. A. (2022). The rise of twiplomacy and the making of customary international law on social media. Chinese Journal of International Law, 21(1), 1-53. https://doi.org/10.1093/chinesejil/jmac007

Social media usage by States has increased exponentially in recent years. This phenomenon, known as "twiplomacy", has become ubiquitous. Given that almost every State in the world now issues statements via social media, this article examines the pote... Read More about The rise of twiplomacy and the making of customary international law on social media.

The rise of twiplomacy and the making of customary international law on social media (2021)
Presentation / Conference
Green, J. (2021, September). The rise of twiplomacy and the making of customary international law on social media. Presented at Society of Legal Scholars Annual Conference, Durham University

In recent years, there has been a huge rise in ‘twiplomacy’: that is, the use of social media as a means of direct diplomatic communication by states. Social media posts from the accounts of governments, government departments and individual high ran... Read More about The rise of twiplomacy and the making of customary international law on social media.

Disasters caused in cyberspace (2016)
Book Chapter
Green, J. A. (2016). Disasters caused in cyberspace. In S. C. Breau, & K. L. H. Samuel (Eds.), Research Handbook on Disasters and International Law (406-427). Cheltenham: Edward Elgar