Treaty on the Prohibition of Nuclear Weapons
Legally binding international agreement to prohibit nuclear weapons

The Treaty on the Prohibition of Nuclear Weapons (TPNW), or the Nuclear Weapon Ban Treaty, is the first legally binding international agreement to comprehensively prohibit nuclear weapons, with the ultimate goal being their total elimination. It was adopted on 7 July 2017, opened for signature on 20 September 2017, and entered into force on 22 January 2021.
“Treaty on the Prohibition of Nuclear Weapons” enters the record as legally binding international agreement to prohibit nuclear weapons. Crown Archives preserves that source wording while asking what Treaty, Prohibition and Nuclear can confirm, complicate or overturn.
Why this record matters
“Treaty on the Prohibition of Nuclear Weapons” is worth following because a concise public description often conceals a longer documentary argument. Here, Treaty, Prohibition and Nuclear provides the most credible route into that argument.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 25, 2026. The first chronological checks are 2017 and 2021.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Treaty on the Prohibition of Nuclear Weapons”, its source revision and the description used here.
- Expand the search: follow Treaty on the Prohibition of Nuclear Weapons primary sources, Treaty on the Prohibition of Nuclear Weapons archive and Treaty research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Treaty on the Prohibition of Nuclear Weapons”?
- Which cited source is closest to the event, object or claim?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “Treaty on the Prohibition of Nuclear Weapons” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.