Deterrence is also a misnomer. The concept of extended nuclear deterrence describes the idea that some non-nuclear-weapon states are made safer by the prospect, in extremis, of a nuclear-armed ally using nuclear weapons to defend them. In Australia’s case, this makes no sense at all.
This means first imagining a situation in which Australia is at risk of standalone attack by a nuclear weapon state. As unlikely as this is, any resulting conflict would be a conventional one – nuclear weapon states have long said that nuclear weapons will only be used against other nuclear-armed states or their allies actively supporting them (and this situation is not changed by Russia’s NATO-driven nuclear posturing over Ukraine). If the United States then came to Australia’s aid, it too would do so with conventional arms, or risk a nuclear attack on its own assets or territory.
Australia is really only likely to be the object of a nuclear weapons strike in the event of a wider war “gone nuclear”, and then only by virtue of its alliance with a nuclear weapon state. In this case, deterrence will very obviously have failed.
In face of this enduring possibility, becoming a state party to the TPNW will not make Australia safer, nor though will it make Australia less safe, which is the thrust of the pragmatists’ critique.
What will the United States think? The United States hates the idea of Australia, or any of its other allies, signing up to the TPNW. But the United States has a poor arms control and disarmament record generally, and Australia is already party to several conventions – the nuclear test ban treaty, the anti-personnel landmines and cluster munitions conventions, the arms trade treaty – that do not include the United States. The US-Australia alliance remains strong despite these differences.
Issues of interoperability have been addressed and are in any case, one would hope, much more likely to arise in the conventional than they are in the nuclear weapons space. This said, Pine Gap’s functions would have to be brought into line with Australia’s new treaty obligations, and visits by nuclear-armed submarines would be against the spirit – if perhaps not, incontrovertibly, against the letter – of the Treaty.
Peter Hooton