How the US-Iran Conflict Affects Global Nuclear Weapon Trends

Apr 26, 2026, 10:30

Introduction

The start of military conflict between the United States and Iran has changed global security. Specifically, it has raised concerns about the spread of nuclear weapons and whether countries can still rely on traditional security agreements.

Main Body

The conflict began on February 28 after the US government claimed that Iran's nuclear program was an immediate threat. Although UN inspectors and US intelligence found no evidence of nuclear weapon production since 2003, the situation has changed. Following the death of Supreme Leader Ayatollah Ali Khamenei, who had previously banned nuclear weapons, some experts believe Iran may now see nuclear arms as the only way to prevent future foreign invasions, pointing to the experiences of Iraq and Ukraine as warnings. Furthermore, Iran might not develop these weapons alone. Analysts suggest that Tehran could buy nuclear technology from North Korea, which has a history of spreading such weapons and maintains strong ties with Iran and Russia. North Korean leaders have even asserted that US actions in Iran prove that having a nuclear deterrent is necessary for survival. These events are also affecting East Asia. In South Korea, a February poll showed that 71% of the public now support owning nuclear weapons because they doubt the US will always protect them. In Japan, while the public is more cautious, Prime Minister Fumio Kishida has not completely ruled out nuclear armament, which is a significant change from Japan's usual diplomatic position. However, both countries face a difficult choice, as leaving the Nuclear Non-Proliferation Treaty (NPT) would lead to severe economic sanctions and diplomatic isolation.

Conclusion

The current global situation shows that arms control treaties are becoming less effective. As a result, many medium-sized powers now believe that possessing nuclear weapons is essential for their national security.

Vocabulary Learning

analyst (n.)
expert / a person who examines something in detail分析師；分析人員
Example:Political analysts are studying the potential outcomes of the upcoming election.
furthermore (adv.)
in addition / used to introduce a further point此外；而且
Example:The new software is user-friendly; furthermore, it is much faster than the old version.
invasion (n.)
attack / an instance of entering a country by force入侵；侵略
Example:The military was on high alert to protect the borders against a possible invasion.
isolation (n.)
separation / the state of being separate from others孤立；隔離
Example:The government's controversial policies led to the country's diplomatic isolation.
significant (adj.)
noticeable / important or large enough to be noticed顯著的；重要的
Example:The new trade agreement will have a significant impact on the local economy.

Sentence Learning

Although UN inspectors and US intelligence found no evidence of nuclear weapon production since 2003, the situation has changed.
Contrast Conjunction: "Although" is used to introduce a subordinate clause that contrasts with the main idea in the sentence.對比連接詞: 「Although」(雖然) 用於引導一個與句子主旨形成對比的從屬子句。
Following the death of Supreme Leader Ayatollah Ali Khamenei, who had previously banned nuclear weapons, some experts believe Iran may now see nuclear arms as the only way to prevent future foreign invasions...
Non-defining Relative Clause: The clause starting with "who" provides additional, non-essential information about the person mentioned.非限制性關係子句: 以「who」開頭的子句為提及的人物提供了額外的補充資訊，但該資訊對句子的核心意義並非不可或缺。
Analysts suggest that Tehran could buy nuclear technology from North Korea, which has a history of spreading such weapons and maintains strong ties with Iran and Russia.
Noun Clause as Object: The word "that" introduces a clause that functions as the object of the verb "suggest," explaining what the analysts are proposing.名詞從句作賓語: 「that」引導一個子句作為動詞「suggest」(建議) 的賓語，解釋了分析人士所提出的內容。
In Japan, while the public is more cautious, Prime Minister Fumio Kishida has not completely ruled out nuclear armament, which is a significant change from Japan's usual diplomatic position.
Sentential Relative Clause: The relative pronoun "which" refers back to the entire preceding idea about the Prime Minister not ruling out nuclear arms.指代整個子句的關係子句: 關係代名詞「which」指代前面關於首相不排除核武裝的整個完整概念。
However, both countries face a difficult choice, as leaving the Nuclear Non-Proliferation Treaty (NPT) would lead to severe economic sanctions and diplomatic isolation.
Gerund as Subject: The phrase "leaving the Nuclear Non-Proliferation Treaty" acts as the subject of the clause, treating an action as a noun.動名詞作主語: 短語「leaving the Nuclear Non-Proliferation Treaty」(退出《不擴散核武器條約》) 作為從句的主語，將一個動作視為名詞。