Nuclear Never? An armed Australia is technically not out of the question.
Australia promised to sign the global nuclear weapons ban. Four years later it hasn't — and the reason tells you everything about where its defence strategy is heading.
Australia has spent four years not signing a treaty its prime minister once called the most important struggle for the human race. That gap between principle and policy is not an oversight. It is a decision, and understanding what drives it tells you more about Australia's strategic position than any defence white paper.
The Pacific's nuclear history is not abstract — and neither is the moral case against signing
The treaty in question, the UN Treaty on the Prohibition of Nuclear Weapons (TPNW), was adopted by more than 120 nations in 2017. It prohibits signatories from facilitating, storing, manufacturing, or deploying nuclear weapons. Before winning office in 2022, Anthony Albanese told the ALP National Conference that a Labor government would sign and ratify it. The resolution passed unanimously. Four years later, the government has not moved.
The activists who gathered at Parliament House recently, a joint delegation of Australian campaigners and Pacific voices including Reverend James Bhagwan of the Pacific Conference of Churches, carry real moral weight. The Pacific's nuclear history is not abstract. The United States conducted 67 nuclear tests on Bikini and Enewetak Atolls in the Marshall Islands. British weapons were detonated off Western Australia's coast and across the Monte Bello Islands through the 1950s and 60s. Australian veterans were exposed; one University of Adelaide study found their cancer rates ran 23 per cent above the general population. Families like that of Maxine Goodwin, whose father died of lymphoma at 41 after servicing aircraft that flew through a radioactive cloud, have been waiting for recognition for decades. Their case for a ban is not sentimental.
No serious Australian government would close that gap by treaty if it could avoid doing so.
The treaty is structurally incompatible with extended nuclear deterrence
But sentiment and strategy are different problems. The reason Australia has not signed the TPNW is the same reason the United States, the United Kingdom, France, and every other NATO-aligned state has not signed it: the treaty is structurally incompatible with extended nuclear deterrence. Washington has been unambiguous that it does not want constraints placed on how it deploys its forces, and Australia's relationship with that deterrent runs deep. Pine Gap and the North West Cape facility provide early warning communications and targeting information that are woven into American nuclear operations. Signing the treaty would not just be symbolic; it would require Australia to unpick arrangements that sit at the core of the alliance.
ICAN co-founder Dave Sweeney points to Thailand and the Philippines as evidence the contradiction can be managed. Both host US bases and have signed the treaty. It is a reasonable observation. But Thailand and the Philippines are not currently committing $368 billion over 30 years to acquire nuclear-powered submarines through AUKUS. Australia is, and that program assumes a deepening integration with American strategic capabilities, not a distancing from them. The comparison does not quite carry the weight placed on it.
The gap between "no nuclear weapons ever" and "no nuclear weapons now" is what strategic ambiguity is designed to preserve
There is also a harder question sitting underneath all of this, one the debate around the TPNW rarely surfaces directly. Could Australia, in some future strategic configuration, consider acquiring nuclear weapons itself? The technical answer is: not quickly, and not easily, but not entirely off the table either. Australia has the industrial base, the scientific knowledge, and with AUKUS will have the nuclear engineering expertise that comes from operating submarine reactors. It is not a weapons program, and there is no policy suggestion it would become one. But the gap between "no nuclear weapons ever" and "no nuclear weapons now" is precisely what strategic ambiguity is designed to preserve. No serious Australian government would close that gap by treaty if it could avoid doing so.
What the activists are really asking for is that Australia put its values ahead of its strategic options. That is not a frivolous request. The Pacific communities living with the intergenerational legacy of nuclear testing have paid a cost they did not choose. Their argument deserves more than a polite hearing and another deferred commitment.
Signing a treaty that limits your options is not a peace gesture — it is a concession
But the government, whatever its pre-election rhetoric, is operating in a strategic environment that has moved sharply in the direction of military investment and alliance consolidation, not disarmament. China's military build-up, the demonstrated fragility of the rules-based order in Europe, and Australia's geographic exposure as a vast continent defended by a small population have all concentrated the mind. Against that backdrop, signing a treaty that limits your options is not a peace gesture. It is a concession.
Albanese made a promise at a conference in 2018 about the world as he saw it then. The world has changed. The promise has not been kept because keeping it would cost something real. The recent activists at Parliament House are right that there is a broken commitment on the table. They are also asking Australia to pay a strategic price the government has already decided it will not pay.
Sources
ABC News — Australia urged to sign treaty banning nuclear weapons
ASPI — The Cost of Defence: ASPI Defence Budget Brief 2026-27
Breaking Defense — Australia's $45.2 billion defence budget
Frequently Asked Questions
Why hasn't Australia signed the UN Treaty on the Prohibition of Nuclear Weapons?
Australia's refusal is a deliberate strategic calculation, not a lapse in political will. Signing the TPNW would require unwinding arrangements at facilities like Pine Gap and North West Cape that are woven into American nuclear operations — arrangements Australia depends on for its extended deterrence guarantee.
What does AUKUS have to do with nuclear weapons treaties?
AUKUS commits Australia to acquiring nuclear-powered submarines, which deepens integration with American strategic capabilities over the next 30 years at a cost of $368 billion. That trajectory makes signing a treaty that constrains nuclear facilitation structurally incompatible with the program's logic, even though the submarines themselves carry no nuclear warheads.
Could Australia ever develop its own nuclear weapons?
Not quickly, and not under current policy — but the technical barriers are lower than they once were. AUKUS will give Australia the nuclear engineering expertise that comes from operating submarine reactors, and it already has the industrial and scientific base. No government is pursuing weapons capability, but none has ruled it out by treaty either, which is itself a form of strategic ambiguity.
Why did Albanese promise to sign the TPNW and then not follow through?
Albanese made the commitment at the 2018 ALP National Conference, when the strategic environment looked different. By the time Labor took office in 2022, China's military build-up, the war in Ukraine, and Australia's deepening AUKUS commitments had shifted the calculus. Signing would cost something real — and the government has decided not to pay that cost.
What are the health effects on Australians from nuclear testing?
British nuclear tests were conducted off Western Australia and across the Monte Bello Islands in the 1950s and 60s, exposing Australian service personnel. A University of Adelaide study found their cancer rates ran 23 per cent above the general population. Affected families, including those of veterans who died from lymphoma after flying through radioactive clouds, are still seeking formal recognition.