General Counsel and United Nations Liaison, International Campaign to Abolish Nuclear Weapons (ICAN), Nobel Peace Prize 2017. @nuclearban #nuclearban

Joined May 2015
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Happy Entry Into Force Day, world! It's been 3⃣ years since the #TPNW's #EIF, we've seen 2⃣ meetings of states parties, and here's 1⃣ take on the #nuclearban treaty's accomplishments in its journey so far.
22 Jan 2024
3..2..1.. Nuclear Weapons are illegal!🙌 3 years ago today, the #NuclearBan Treaty entered into force and now we have a treaty that gives us a clear path to eliminate the threat of nuclear weapons use. Learn more about the impact of the treaty here 🔗➡️icanw.org/three_years_on_how…
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Seth Shelden retweeted
Apr 21
Today, Amb. Juan Carlos Ojeda, Secretary-General of OPANAL, participated in a side event co-organized with the Permanent Mission of Uruguay, in its capacity as Co-Chair of the Informal Working Group on the Universalization of the Treaty on the Prohibition of Nuclear Weapons #TPNW
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Seth Shelden retweeted
As Gender Focal Point under the Treaty on the Prohibition of Nuclear Weapons, Malta continues to advance the integration of gender perspectives into nuclear disarmament and non-proliferation.
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Replying to @napf @nuclearban
Speakers emphasized the importance of multilateral cooperation, education, and youth engagement in advancing nuclear disarmament and preventing proliferation.
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🧵African states have been leading global efforts to rid the world of the existential threat nuclear weapons pose, first with the Treaty of Pelindaba establishing a nuclear free zone in the continent, and today with the #NuclearBan Treaty. Read more: icanw.org/west_and_central_a…
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It has been a privilege to be here in 🇬🇭 Accra 🇬🇭 to convene this conference, in partnership with @MFA_Austria and @GhanaMFA, to discuss efforts to universalise and implement the #nuclearban treaty. It's just getting started now!
🧵Hello from Accra, Ghana🇬🇭! Today, African states, together with international and regional orgs, are meeting here for the West African Regional Conference on the Universalisation and Implementation of the Treaty on the Prohibition of Nuclear Weapons. #NuclearBan #Africa4TPNW
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Seth Shelden retweeted
Trump is misinformed and out of touch. The U.S. has no technical, military, or political reason to resume nuclear explosive testing for the first time since 1992. It would take least 36 months to resume contained nuclear tests underground at the former test site in Nevada. 1/
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21 Oct 2025
3/ ICAN’s @SethShelden gave a presentation about the growing membership of the treaty, including that the treaty has just reached a “global majority” of states as parties or signatories; a clear sign of momentum and an invitation for all States to step up and join the #NuclearBan
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TONIGHT: Join us for a teach-in on how activists and experts are working toward a better nuclear status quo, featuring @jmsleight @SethShelden @normansolomon. Register here: us06web.zoom.us/webinar/regi…
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Seth Shelden retweeted
📅 Teach-In Alert! RSVP to the Teach-In Network's upcoming teach-ins now, including Q&A with experts. Oct 16: Strategies for Nuclear Disarmament bit.ly/48VCa2v Oct 30: Opposing War with Iran bit.ly/46ROsYx Nov 13: The United States’ Accountability for Palestine bit.ly/3IOpK1S
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Seth Shelden retweeted
Yesterday, Ghana boldly demonstrated to the world that we shall be a Nuclear-Weapon-Free State by depositing our instrument of ratification on the Treaty on the Prohibition of Nuclear Weapons (TPNW) at the UN. I commend the Ghanaian Cabinet and Parliament for the unanimous ratification. As I indicated in my UN address, Ghana has been consistent across all political parties in advocating for total disarmament and creating a new world without nuclear weapons. Ghana’s Founder, Osagyefo Kwame Nkrumah who convened the 1962 World Without the Bomb conference in Accra would be absolutely proud of this moment. It was an honour to meet with the inspiring Melissa Parke and Seth Shelden of the International Campaign to Abolish Nuclear Weapons (ICAN). ICAN won the 2017 Nobel Peace Prize for their groundbreaking work to attain a world without nuclear weapons. We shall triumph, and end global impunity. For God, Country and the World. 🇬🇭 🇺🇳 🙏🏾
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Seth Shelden retweeted
25 Jul 2025
There are only two ways the era of nuclear weapons will end - either we abolish our nuclear weapons, or our weapons will abolish humanity. The United States must join the Treaty on the Prohibition of Nuclear Weapons and join over half of the countries around the world in mutual disarmament.
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Seth Shelden retweeted
12 Jun 2025
🏛️Athens says NO to nuclear weapons! The capital of Greece has unanimously adopted the Cities Appeal, making it the 12th capital city in the world to join us in the fight against these weapons of mass destruction after Paris, Rome and Washington DC ! #NuclearBan
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Seth Shelden retweeted
12 Jun 2025
Athens, the capital of Greece and birthplace of democracy has joined the ICAN Cities Appeal today, by endorsing the #TPNW and calling on the Greek government to join the treaty. 👏👏👏
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Advancing #nuclearban progress, despite increasing global risks and challenges, but also, of course, because of increasing global risks and challenges:
13 May 2025
1/ Although we were disappointed by the proceedings of last week’s #NPTPrepCom, and its non-outcome, we managed to hold a number of promising meetings on the sidelines, including relating to the Treaty on the Prohibiton of Nuclear Weapons. More #NuclearBan moments in the thread🧵
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Moments ago, the third #NPTPrepCom failed to adopt any outcome, reflecting a horrifying lack of urgency in response to current risks. Yet we've been encouraged by constructive leadership from #TPNW states, and their efforts to reinforce non-proliferation and disarmament norms.
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Seth Shelden retweeted
7 May 2025
1/ ICAN is gravely concerned by escalating hostilities between nuclear-armed India and Pakistan, including last night’s missile strikes and nuclear threats. A nuclear exchange would be catastrophic for the world. Read our full statement here: icanw.org/ican_response_indi… #NuclearBan
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Kyrgyzstan (which has previously abstained on resolutions relating to the TPNW) has today announced they will join the treaty. 👏🏼🇰🇬#nuclearban
30 Apr 2025
In today's general debate at the #NPTPrepCom, Kyrgyzstan announced that “has made the political decision to join to the TPNW” because they are “committed to ensuring that future generations live without the threat posed by weapons of mass destruction.” 👏🇰🇬
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Seth Shelden retweeted
11 Mar 2025
🧵The 3rd Meeting of States Parties to the Treaty on the Prohibition of Nuclear Weapons (#TPNW) concluded last week with a strong political declaration rejecting nuclear weapons and challenging nuclear deterrence. Here’s what you need to know: icanw.org/tpnw_third_meeting…
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Seth Shelden retweeted
11 Mar 2025
🧵1/ A huge THANK YOU to 🇰🇿 @KazakhstanUN for its leadership in hosting the 3rd Meeting of States Parties to the #TPNW! Kazakhstan knows firsthand the devastating consequences of nuclear testing and their leadership in nuclear disarmament is a testament to resilience. #NuclearBan
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Seth Shelden retweeted
7 Mar 2025
🚨The 3rd Meeting of States Parties to the #TPNW has concluded with a strong message: nuclear weapons & deterrence threaten us all. States agreed that the #NuclerBan is the alternative to reckless nuclear deterrence and proliferation. Read more here: icanw.org/tpnw_third_meeting…
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