South Korea's Nuclear Dilemma Grows as Public Backs Armament Amid Rising Threats

Public support for nuclear armament is rising sharply in South Korea. A 2023 poll found that 71% of citizens now back the idea of their country developing its own nuclear weapons. The shift comes as regional tensions grow, fuelled by North Korea's missile tests and broader security concerns.

President Yoon Suk-yeol has openly discussed the possibility of either building a domestic arsenal or pushing for the return of US nuclear arms to the peninsula. His comments reflect a wider debate about how Seoul should respond to mounting threats from Pyongyang and beyond.

North Korea's nuclear ambitions have intensified in recent years. Last year alone, the regime launched over ninety ballistic and cruise missiles. Supreme Leader Kim Jong-un also announced plans to mass-produce nuclear-capable weapons and revised his doctrine to allow preemptive strikes in a crisis. These moves have heightened fears in Seoul about the reliability of existing security guarantees.

The war in Ukraine has added to those concerns. After giving up its Soviet-era nuclear stockpile in the 1990s, Ukraine faced invasion by Russia in 2022. For many South Koreans, this serves as a warning about the risks of disarmament. The country's reliance on US protection—through the so-called nuclear umbrella—now appears less certain to some.

Historically, the US stationed tactical nuclear weapons in South Korea from the 1950s until 1991. Since then, Washington has relied on extended deterrence, promising to defend allies with US-based assets. But recent statements from the Biden administration have ruled out redeploying nuclear arms to the peninsula. Instead, officials stress closer consultations with Seoul and strengthening joint defence plans.

Yoon's government has so far ruled out immediate nuclear development. However, the president has repeatedly signalled that all options remain on the table if threats escalate. His party campaigned on a tougher stance during the 2022 election, and his rhetoric has kept the issue in the spotlight. Withdrawing from the Nuclear Non-Proliferation Treaty (NPT) would carry heavy costs, including sanctions and the loss of civilian nuclear cooperation. Yet the pressure to act is growing as China expands its own arsenal and North Korea's capabilities advance.

Analysts argue that preventing proliferation in South Korea will require the US to balance two approaches. Washington must clearly outline the economic and diplomatic risks of going nuclear while giving Seoul a stronger voice in alliance decisions. The challenge is to reassure South Koreans without triggering an arms race in the region.

The debate extends beyond politics. Ordinary citizens, increasingly anxious about security, are driving the push for change. Many now question whether traditional deterrence strategies can keep pace with the evolving threats from Pyongyang and Beijing.

For now, South Korea remains committed to its alliance with the US and has not taken steps toward nuclear armament. But the public mood and political discussion suggest the issue will stay alive. How Washington responds to Seoul's concerns could shape the future of nuclear stability in East Asia. The coming years will test whether diplomacy and deterrence can hold—or if the region edges closer to a new arms race.