León Castellanos-Jankiewicz
@leoncastjan.bsky.social
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international law and arms trade. working on the b sides leoncastellanos.com
pinned post!
🎯 New publication: As Europe prepares for war, we argue that current EU rearmament proposals could erode the rule of law. I thank my wonderful co-authors, from whom I learnt a great deal in
@tmcasser.bsky.social
& beyond. 🔗 Full article (open access):
edseq.lexxion.eu/article/EDSE...
6 months ago
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Off-kilter analogy but no less chilling: “Autonomous weapons are the new nuclear weapons. Countries that possess them will be protected.”
www.nytimes.com/2026/05/15/w...
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Enter the Killer Robots: The Ukrainian Forging the Future of Warfare
https://www.nytimes.com/2026/05/15/world/europe/mykhailo-fedorov-ukraine-ai.html
14 days ago
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León Castellanos-Jankiewicz
Watson School at Brown
15 days ago
New Trending Globally #podcast: How do borders shape our society?
Ieva Jusionyte
, director of Brown’s Center for Human Rights and Humanitarian Studies, discusses immigration enforcement, border communities, and her award-winning research.
https://ow.ly/Tzin50YZAml
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Border politics at our doorstep with Ieva Jusionyte
Quickly and easily listen to Trending Globally: Politics and Policy for free!
https://ow.ly/Tzin50YZAml
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Stuart Kauffman on "new-in-the-universe possibilities": "Humility then becomes rational rather than moralistic. Humility in this frame is not a virtue-signaling posture. It becomes epistemically and ontologically appropriate." via
@noemamag.com
www.noemamag.com/emergence-is...
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Emergence Is Not Engineering | NOEMA
The universe creatively sets the rules for its own becoming.
https://www.noemamag.com/emergence-is-not-engineering/
15 days ago
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"The groups also accused the European Commission of prioritising defence industry interests over transparency and democratic scrutiny, warning that the omnibus package risks accelerating global arms sales under the cover of technical reform."
www.euractiv.com/news/ngos-wa...
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NGOs warn EU defence overhaul could weaken arms export controls | Euractiv
Campaigners say reforms would reduce transparency over military transfers
https://www.euractiv.com/news/ngos-warn-eu-defence-overhaul-could-weaken-arms-export-controls/
16 days ago
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Nice running into
@lyndseystonebri.bsky.social
today
18 days ago
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Undermining EU coordination, some "rich" Member States are breaking ranks to avoid co-financing defense spending of EU nations that have lower credit ratings
nltimes.nl/2026/03/17/n...
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Netherlands, UK, Finland plan multilateral defense fund to boost European rearmament
The Netherlands, the UK, and Finland plan to create a new financing body for defense initiatives. The Multilateral Defense Mechanism (MDM), open to nations with strong credit standings, aims to stimul...
https://nltimes.nl/2026/03/17/netherlands-uk-finland-plan-multilateral-defense-fund-boost-european-rearmament
18 days ago
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Late to this - worth reading if you haven't:
turinsche.substack.com/p/issue-43-h...
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Issue 43: Human Rights for the Arms Trade
Why HRDD Matters in Venture-Backed Defense & Dual-Use Startups.
https://turinsche.substack.com/p/issue-43-human-rights-for-the-arms
22 days ago
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Europe, slouching towards the democratization of war
cepa.org/article/how-...
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How Private Capital Can Accelerate European Rearmament
Europe’s defense industry supply chains are technology dependent and lack surge capacity. Private capital can help if legislators act.
https://cepa.org/article/how-private-capital-can-accelerate-european-rearmament/
22 days ago
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🎬 Great to see this out! It was a pleasure to join leading experts and practitioners to discuss EU defence procurement. My bottom line: EU procurement fragmentation comes at high costs, and impacts accountability, human rights & the rule of law.
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EIPA in Conversation With - European Defence Procurement in a Changing Geopolitical Landscape
YouTube video by European Institute of Public Administration - EIPA
https://www.youtube.com/watch?v=e2SJwUcv0jI
2 months ago
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Our new co-edited symposium on 'Business and Human Rights and the arms industry: challenges, prospects, and current dynamics' is published in the Business and Human Rights Journal ! Here is our Editorial:
www.cambridge.org/core/journal...
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Corporate Accountability in the Arms Sector: Possibilities, Limits, and Visions of Justice | Business and Human Rights Journal | Cambridge Core
Corporate Accountability in the Arms Sector: Possibilities, Limits, and Visions of Justice - Volume 11 Issue 1
https://www.cambridge.org/core/journals/business-and-human-rights-journal/article/corporate-accountability-in-the-arms-sector-possibilities-limits-and-visions-of-justice/583921822C99793B5004C60053BE326F
2 months ago
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"The talk of ‘our values’ that has now become commonplace contributes to the devaluation of rationally justified principles."
granta.com/europes-mist...
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Europe’s Mistake
‘I’ve never accepted the conception of political realism, which can be traced back to Carl Schmitt and Hans Morgenthau, that justice between nations is impossible.’
https://granta.com/europes-mistake/?fbclid=IwY2xjawQkcDRleHRuA2FlbQIxMQBzcnRjBmFwcF9pZBAyMjIwMzkxNzg4MjAwODkyAAEePRrvj8dbNDu-HFRX-58_2BreDg5YHBTC2mqCC3c3he-bwhC8C10yJ_nc3Yk_aem_Fm-St3zKeRk8DPm-yxvRbw
2 months ago
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reposted by
León Castellanos-Jankiewicz
The Syllabus
3 months ago
The killing of CJNG leader “El Mencho” unleashed chaos across Mexico—but not all of it was real. This piece details how the cartel used a mix of real violence and AI-fueled disinformation to amplify terror nationwide. By
@evodzoni.bsky.social
&
@liliasaul.bsky.social
in
@occrp.org
buff.ly/PnynJIs
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Fear is the Message: How the Jalisco New Generation Cartel Weaponized Algorithms to Paralyze Mexico
In the hours after Mexican drug lord "El Mencho’s" killing by the military, his Jalisco New Generation Cartel responded by deploying hundreds of roadblocks, torching banks and supermarkets — and…
https://www.occrp.org/en/feature/fear-is-the-message-how-the-jalisco-new-generation-cartel-weaponized-algorithms-to-paralyze-mexico
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Great episode on agency, post-humanism and tech:
open.spotify.com/episode/72nt...
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Spotify – Web Player
https://open.spotify.com/episode/72ntHkFaY8V5SlGr5I44cj?si=ed1c0957446444ca
3 months ago
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New publication! Delighted to share my chapter on corporate accountability for wrongful arms transfers forthcoming in The Cambridge Handbook on Litigating Business and Human Rights Violations edited by H. Ahmad, E. Aristova and R. Chambers:
papers.ssrn.com/sol3/papers....
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Corporate Accountability for Wrongful Arms Transfers
This paper examines legal accountability mechanisms available to victims of harm caused by wrongful arms transfers, analysing the interplay between state respon
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=6377119
3 months ago
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Worrisome to say the least
euobserver.com/203546/how-t...
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How the EU is deregulating arms-control to be like any other industry
A new legislative package — the Defence Readiness Omnibus — threatens to overhaul how weapons are produced and sold, creating a dangerous precedent for global security. By doing so, the EU is effecti...
https://euobserver.com/203546/how-the-eu-is-deregulating-arms-control-to-be-like-any-other-industry/
3 months ago
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León Castellanos-Jankiewicz
Dinosaur Comics!
3 months ago
that's a big oopsie-doopsie on my part, and i apologize
qwantz.com/index.php?co...
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I write today for
@euractiv.com
about how contradictory national rearmament policies in Europe are playing into Russia's hands:
add a skeleton here at some point
3 months ago
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Excellent opportunity for anyone wishing to engage with a vibrant and supportive community in the arms trade space :
add a skeleton here at some point
4 months ago
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reposted by
León Castellanos-Jankiewicz
Forum on the Arms Trade
4 months ago
Yesterday's Trump executive order establishes an "America First Arms Transfer Strategy"... which appears to replace the Conventional Arms Transfer Policy. See updated resource
www.forumarmstrade.org/catpolicy.html
EO -
www.whitehouse.gov/presidential...
factsheet -
www.whitehouse.gov/fact-sheets/...
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US Conventional Arms Transfer Policy
Resources and expert assessment of US Conventional Arms Transfers (CAT) Policy
https://www.forumarmstrade.org/catpolicy.html
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New publication: Happy to see our
@asilorg.bsky.social
Closing Plenary "Can Arms Trade Bring About Peace?" in the Proceedings of the American Society of International Law 2025 Annual Meeting. Thank you to the panelists for their insightful remarks. Full text:
www.cambridge.org/core/journal...
4 months ago
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New START sunsets in 2 days:
www.nytimes.com/2026/01/30/o...
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Opinion | Let the Arms Race Begin
https://www.nytimes.com/2026/01/30/opinion/nuclear-treaty-deal-start.html
4 months ago
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The Progressive Post - Does peace still have a chance?
feps-europe.eu/wp-content/u...
4 months ago
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León Castellanos-Jankiewicz
Oded Rechavi
4 months ago
The way to accelerate science is to SLOW it down. Fewer papers please! We’re drowning in meaningless text. One GREAT paper per lab per decade is more than enough. q.e.d 👇
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León Castellanos-Jankiewicz
Small Arms Survey
4 months ago
Ammunition remains the most traded small arms category worldwide, accounting for 35% of the value of reported global imports for the period 2019–24. Read more in this Situation Update from 2025, part of a collaborative project supported by SNIS:
www.smallarmssurvey.org/resource/aut...
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The Authorized Trade in Small Arms: Latin America from a Global Perspective
Situation Update: Latin AmericaBased on UN Comtrade data, reported global small arms and light weapons (hereafter ‘small arms’) exports rose sharply from USD 5 billion in 2019 to USD 9.2 billion in 20...
https://www.smallarmssurvey.org/resource/authorized-trade-small-arms-latin-america-global-perspective
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Two postdoctoral researcher roles at the University of Sussex for a project on "Technology and the (future) Human in War":
jobs.sussex.ac.uk/job/36e1adc2...
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Postdoctoral Research Fellow – Technology and the (future) Human in War x2 Ref: 43027 & 43028 (Fixed Term) - Job page - University of Sussex Job Search
https://jobs.sussex.ac.uk/job/36e1adc2-a280-44fe-9d1a-25be074b3538
4 months ago
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reposted by
León Castellanos-Jankiewicz
Forum on the Arms Trade
4 months ago
"European Rearmament and U.S. Weapons Reliance" by León Castellanos-Jankiewicz, Senior Researcher, Asser Institute for International and European Law in The Hague
@leoncastjan.bsky.social
#TrumpAtOneYear
www.forumarmstrade.org/trump_yearon...
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León Castellanos-Jankiewicz
george 💿
4 months ago
one year since David Lynch passed, happy friday and RIP big dawg
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"Instead of using new resources to build pathways for deeper European cooperation, consolidate demand, and reduce strategic dependencies, Europe’s decisionmakers are spending these resources in ways that reinforce fragmentation."
carnegieendowment.org/research/202...
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Rebalancing the Transatlantic Defense-Industrial Relationship: Regional Pragmatism in Northeastern Europe
Facing acute threats, states in Northeastern Europe are pioneering a pragmatic model of defense-industrial cooperation that offers lessons for managing transatlantic dependencies in an era of uncertai...
https://carnegieendowment.org/research/2025/12/rebalancing-the-transatlantic-defense-industrial-relationship-regional-pragmatism-in-northeastern-europe?lang=en
5 months ago
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"Pavel Podvig, a Geneva-based expert on Russia’s nuclear forces, said he was skeptical deploying the Oreshnik would provide Moscow with any additional military or political advantages other than reassuring Belarus of its protection."
www.reuters.com/world/europe...
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Exclusive: Russia likely placing new hypersonic missiles at former airbase in Belarus, researchers find
Deployment of the Oreshnik would underscore the Kremlin’s growing reliance on the threat of nuclear weapons as it seeks to deter NATO members from supplying Kyiv with weapons.
https://www.reuters.com/world/europe/us-researchers-identify-likely-belarus-site-new-russian-nuclear-capable-missile-2025-12-26/
5 months ago
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León Castellanos-Jankiewicz
IWM Vienna
5 months ago
📣 Call for applications! We are currently accepting applications for the Milena Jesenská Fellowship, a three‑month residency for cultural journalists from across Europe, offering a monthly stipend, workspace, and access to the IWM community. More info & to apply:
www.iwm.at/calls/milena...
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"The export ban on weapons to Israel will continue to apply, while a full permit procedure and thorough end-use inspections will remain mandatory for high-risk destinations, including countries subject to sanctions or affected by armed conflict."
www.belganewsagency.eu/flemish-gove...
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Flemish government relaxes arms trade rules and invests in defence innovation
The Flemish government has approved a new draft arms trade decree to facilitate the legitimate trade in military goods, civilian firearms...
https://www.belganewsagency.eu/flemish-government-approves-new-arms-trade-decree
5 months ago
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León Castellanos-Jankiewicz
Sam P-F
5 months ago
Happy Solstice! The shortest day of the year in the northern hemisphere. For places north of the Arctic Circle, that means that the sun does not rise all day, right? Wrong! There's an asymmetry between day and night,in favour of day, which is more pronounced the further you go from the poles. 1/5
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León Castellanos-Jankiewicz
Jonathan Lowy
5 months ago
U.S. gun policies is an international issue. Most crime guns in Canada are trafficked from the U.S. Bad actors in the gun industry enable and profit from it. We need @actiononguns.
www.nytimes.com/2025/12/21/w...
Excellebt reporting from @onishinyt @nytimes
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As U.S. Guns Pour Into Canada, the Bodies Pile Up
https://www.nytimes.com/2025/12/21/world/americas/canada-gun-violence-us.html?smid=nytcore-ios-share
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How does defense tech undermine the traditional industrial base and legacy weapons manufacturers? Historian Susannah Glickman discusses this interesting proposition via
@lawfaremedia.org
:
shows.acast.com/lawfare/epis...
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Lawfare Daily: The Defense Tech Paradox, with Susannah Glickman | The Lawfare Podcast
https://shows.acast.com/lawfare/episodes/lawfare-daily-the-defense-tech-paradox-with-susannah-glickma
5 months ago
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reposted by
León Castellanos-Jankiewicz
The Syllabus
5 months ago
Europe’s push to arm Ukraine has sparked debates about its defence. Our article of the week outlines two competing visions of EU security: a state-led “war economy” and Silicon Valley-inspired disruptive tech. By
@jocelynmawdsley.bsky.social
in
@geopoliticsjournal.bsky.social
buff.ly/AC8otpn
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UK joins defence exports treaty with France, Germany and Spain where parties "shall not oppose a transfer or export to a third party" aside from in "exceptional situations". This could increase the risk of downstream damage caused by UK defence products.
www.gov.uk/government/p...
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Agreement on Defence Export Controls
The UK has joined a defence exports treaty with France, Germany and Spain which will make it easier for UK defence businesses to export.
https://www.gov.uk/government/publications/agreement-on-defence-export-controls
5 months ago
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reposted by
León Castellanos-Jankiewicz
Santa Fe Institute
5 months ago
For most of history, societies drew firm lines between those who belonged and those who didn't, shaping who was protected or excluded. Beginning in the Enlightenment, European societies began expanding rights. A recent SFI working group is examining the historical forces driving this expansion.
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Understanding the historical forces driving the expansion of human rights
For most of human history, large societies have drawn clear lines between people who belong to the in-group and those who do not. These lines determine who is recognized, protected, or granted status,...
https://www.santafe.edu/news-center/news/understanding-the-historical-forces-driving-the-expansion-of-human-rights
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León Castellanos-Jankiewicz
Ieva Jusionyte
5 months ago
because all i’ve been capable of these days has been talking and texting with my students, and writing
www.bostonglobe.com/2025/12/17/o...
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I’m a scholar of gun violence. Not even I can process what happened at Brown. - The Boston Globe
My typical response to school shootings is to call for policy changes. But I’m afraid the task ahead is bigger than that.
https://www.bostonglobe.com/2025/12/17/opinion/brown-shooting-gun-policy/
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"It’s the season of peace and goodwill—unless you’re a European defense official."
www.wsj.com/opinion/euro...
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Opinion | Europe Wakes Itself Up on Defense
Some European leaders finally see the dangers clearly, but do voters?
https://www.wsj.com/opinion/europe-defense-nato-mark-rutte-friedrich-merz-russia-vladimir-putin-559a3890?mod=hp_opin_pos_2
5 months ago
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reposted by
León Castellanos-Jankiewicz
Oona Hathaway
6 months ago
Now out! "Crowdsourced War"
@nyulawreview.bsky.social
We describe a revolution in war fighting that we call “Crowdsourced War.” It's putting civilians at risk around the globe. It is time to adopt new rules to protect civilians from the new risks they face.
papers.ssrn.com/sol3/papers....
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reposted by
León Castellanos-Jankiewicz
Jocelyn Mawdsley
6 months ago
Very happy to say that my article with
@brunoomartins.bsky.social
'War economy vs European Silicon Valley? The EU's competing sociotechnical imaginaries of defence innovation and industry' has just been published in
@cspjournal.bsky.social
:
www.tandfonline.com/doi/full/10....
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War economy vs European Silicon Valley? The EU's competing sociotechnical imaginaries of defence innovation and industry
The war in Ukraine and the US administration's growing disengagement from European security have led to a paradigm shift in European defence. While contestation and negotiation about strategic prio...
https://www.tandfonline.com/doi/full/10.1080/13523260.2025.2599280
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León Castellanos-Jankiewicz
Euractiv
6 months ago
Total bids for the Commission’s SAFE loans reach nearly €190 billion
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Total bids for the Commission’s SAFE loans reach nearly €190 billion
Demand surpassed the SAFE loan envelope by about €40 billion
http://dlvr.it/TPnHZt
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reposted by
León Castellanos-Jankiewicz
Carnegie Democracy
6 months ago
The age of networked, technologically disrupted warfare requires new strategies, innovations and regulations ‼️"The Digital in War: From Innovation to Participation" series from
@carnegieendowment.org
&
@forsvarshogskolan.bsky.social
analyses these evolutions 🧵⏬
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The Digital in War: From Innovation to Participation
The age of technological disruption in warfare is here. Read the complete series (PDF).
https://carnegieendowment.org/programs/democracy-conflict-and-governance/the-digital-in-war-from-innovation-to-participation?lang=en
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reposted by
León Castellanos-Jankiewicz
Irish News 🇮🇪
6 months ago
Russia could attack Nato within five years, says alliance chief in stark new warning Russian could attack Nato within five years, Mark Rutte said, warning allies to start ramping up preparations "now".
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We must prepare for war with Russia, says Nato chief in stark new warning
Russian could attack Nato within five years, Mark Rutte said, warning allies to start ramping up preparations "now".
https://www.bbc.com/news/articles/cn81x8py3j5o
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🎯 New publication: As Europe prepares for war, we argue that current EU rearmament proposals could erode the rule of law. I thank my wonderful co-authors, from whom I learnt a great deal in
@tmcasser.bsky.social
& beyond. 🔗 Full article (open access):
edseq.lexxion.eu/article/EDSE...
6 months ago
0
1
0
reposted by
León Castellanos-Jankiewicz
Small Arms Survey
6 months ago
Save the date! 10 December, 16h00-17:30 CET, the online launch of our new Report on
#Ukraine
. Weapons Compass: Proliferation and Control of Arms and Ammunition in Wartime Ukraine analyzes small arms proliferation and control efforts in Ukraine since the Russian full-scale invasion in February 2022
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ESG is done
www.euronews.com/my-europe/20...
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EU opens door to ESG labels for companies producing weapons
Despite objections from the left, the European Parliament has approved a tweak to sustainable finance benchmarks that would open it up to companies producing “controversial weapons”.
https://www.euronews.com/my-europe/2025/11/26/eu-opens-door-to-esg-labels-for-companies-producing-controversial-weapons
6 months ago
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'"Beautiful opportunities are emerging,” CEO Joep van Beurden told FD. '
nltimes.nl/2025/11/24/d...
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Dutch manufacturers expand into defense sector with €22 billion in government funding
Dutch manufacturing companies including Aalberts, Signify, and Kendrion are increasingly focusing on producing components for the defense sector, taking advantage of rising military budgets in the Net...
https://nltimes.nl/2025/11/24/dutch-manufacturers-expand-defense-sector-eu22-billion-government-funding
6 months ago
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"The calculations of how to build an effective fighting force are complex. Particularly when, on average, fewer than one-third of European Union citizens said they were willing to fight for their country in a war"
www.nytimes.com/2025/11/24/b...
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A Draft or Volunteers? Russian Threat Prompts Urgent Debate in Europe.
https://www.nytimes.com/2025/11/24/business/economy/russia-ukraine-europe-military.html?searchResultPosition=1
6 months ago
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Rainy Sunday reading Holly Case's latest:
www.lrb.co.uk/the-paper/v4...
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Holly Case · Thin Pink Glaze: Habsburg Legacies
We still live in the long shadow of Habsburg disintegration. In addition to the lingering legacy of 19th-century state...
https://www.lrb.co.uk/the-paper/v47/n21/holly-case/thin-pink-glaze?utm_campaign=3956561_20251122ICYMI&utm_medium=email&utm_source=LRB%20email&dm_i=7NIQ,2CSWH,3EIEPX,4MUTO,1
6 months ago
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