The Gradual Erosion Of The Nuclear Taboo Wavell Room Audio Reads podcast

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The Gradual Erosion of the Nuclear Taboo

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Introduction
This year marked the 80th anniversary of the atomic bombing of Hiroshima and Nagasaki. Since then, the non-use of nuclear weapons has remained the single most significant phenomenon of the nuclear age. Central to any discussion of global nuclear politics is the term nuclear taboo, which refers to a de facto prohibition against the first use of nuclear weapons. The nuclear taboo is not the act of non-use itself, but the deeply rooted belief that such use is illegitimate.
This belief has endured for nearly 80 years, but the foundations are beginning to crack.
While the nuclear taboo has historically played a significant role in limiting the use of nuclear weapons, contemporary geopolitical shifts, rhetorical normalisation of nuclear use, and the weakening of nuclear diplomacy indicate a gradual erosion of this norm. What the world is now witnessing is an exponential increase in stockpiles, an escalation in nuclear rhetoric, and the erosion of arms control regimes.
In the meantime, there is also an acceleration in the production and deployment of new nuclear weapons, with the rising geopolitical tensions.
Escalating Nuclear Rhetoric
Rhetoric holds a constitutive role when it comes to international politics. We can see how the power of language can shape issues such as national identity or give birth to social movements. One of the reasons why the tradition of nuclear non-use is a taboo, but not only a norm, is the subjective and intersubjective sense of taboo-ness. It manifests itself in how nuclear weapons have been discussed and interpreted over the years.
How state actors speak about nuclear use is critical in altering the normative structures governing their use. For instance, in January 2024, Israeli Heritage Minister Amihai Eliyahu made headlines by commenting that a "nuclear attack" was an option in case of Gaza. His remark was eventually met with international outrage, which led to his suspension from cabinet meetings. More worryingly, it signalled a normalisation of extreme language when referring to conflict and war.
From the East…and the West
Only a matter of months after Eliyahu's statement on Gaza, a similar shift in rhetoric was adopted by Russian President Vladimir Putin. He expanded Moscow's nuclear doctrine to allow any conventional attack by non-nuclear states that were allied to a nuclear power to be met with a nuclear strike, as if they themselves were armed with nuclear weapons.
In April 2025, the senior Iranian official Ali Larijani declared that Iran would be obliged to reevaluate its nuclear stance, should the Western powers act irresponsibly. This sharply contrasted with Iran's former assertions that aimed to maintain its intentions were peaceful about its nuclear program. The erosion of conventional deterrence after direct strikes by Israel and the United States eventually developed into nuclear signalling.
Rhetoric from the West, particularly following the return of Donald Trump to power, has become more confrontational. This hardening stance has likely led to the changing perception of a threat to Iran, paving the way for miscalculation. Moreover, the growing normalisation of aggressive nuclear signalling across conflict zones increases the risk of escalation and misjudgment. In a recent statement, President Donald Trump defended the American strikes against Iran.
He compared them to the use of nuclear weapons against Hiroshima and Nagasaki, which, according to him, brought an end to the Second World War. This type of language promotes the rhetorical normalisation of escalation by reframing the conversation around nuclear use, which eats away at the taboo over time.
A world that is rearming at an alarming rate
What makes this rhetorical shift more alarming is the material reality that accompanies it. As nuclear discourse grows more casual, nuclear states overtly invest in hard (military) power, as evidenced by the record levels of global military expenditure. In 2024, global defence sp...

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