OBSESSION OF THE U.S. OVER THE IRANIAN NUCLEAR PROGRAM: WHY?A Chronological Analysis

By Mohd Azmi Abdul Hamid

The U.S. fixation on Iran’s nuclear program is not merely about centrifuges, uranium enrichment, or safeguards reports. It is about power, regional control, alliance politics, the security architecture of West Asia, and the refusal to allow an independent Iran to emerge as a strategic pole beyond American influence.

The nuclear file became the most effective language through which Washington could justify pressure, sanctions, isolation, and, at critical moments, military escalation. �
2009-2017.state.gov +2

A chronological reading makes this clear. The “nuclear issue” did not begin as a pure non-proliferation concern. It evolved into a geopolitical instrument.

1. The Shah era: when Iran’s nuclear ambition was acceptable

The first irony is historical. Iran’s nuclear ambition was not originally treated by Washington as inherently dangerous. Under Shah Mohammad Reza Pahlavi, Iran was a close U.S. ally, and American officials discussed Iran’s nuclear future in a cooperative strategic framework. U.S. archival records show senior officials treated Iran as a partner within a pro-Western regional order, not as an intolerable proliferator. �
history.state.gov +1

This is the first clue to the deeper issue: the same country pursuing nuclear technology was tolerated when it was politically subordinate to Washington. Iran’s nuclear capacity became unacceptable only after Iran itself became politically independent and defiant.

2. 1979: the Islamic Revolution changed everything

The 1979 Islamic Revolution transformed Iran from a U.S. pillar into a strategic challenger. The fall of the Shah, the hostage crisis, and the birth of an anti-imperialist Islamic Republic reshaped the American view of Iran.

From that point onward, nearly every Iranian strategic capability, military, ideological, diplomatic, and technological, was viewed through a threat lens. �
everycrsreport.com +1

This is when the nuclear issue ceased to be only technical. It became political. Washington no longer asked merely, “Does Iran have nuclear know-how?” It asked, “Can an anti-U.S. state possess advanced strategic capability while resisting U.S. hegemony?”

3. The post-Cold War shift: from containment to permanent suspicion

During the 1990s and early 2000s, the U.S. increasingly framed Iran as a rogue state. Nuclear suspicion intensified as Iran expanded fuel-cycle activities. The IAEA chronology shows that from 2002 onward, Iran’s undeclared nuclear activities became the center of international scrutiny, leading to Board resolutions, safeguards disputes, and escalating pressure. �
IAEA +1

But even here, it is important to distinguish between three issues that Washington often compressed into one narrative: civilian nuclear capability, enrichment capacity, and actual weaponization. These are not identical. That distinction matters because U.S. rhetoric often treated enrichment itself as near-criminal when pursued by Iran, even though enrichment for peaceful purposes exists within the broader framework of the NPT under safeguards obligations and verification. The dispute was therefore never only legal, it was profoundly political. �
2009-2017.state.gov +1

4. 2003: the key intelligence turning point

One of the most important facts in this entire history is that the 2007 U.S. National Intelligence Estimate concluded with high confidence that Iran had halted its nuclear weapons program in fall 2003.

Later discussion of that estimate stressed there was no firm public conclusion that Iran had decided to build a bomb after that halt. �
CIA +1

This finding is devastating to the simplistic U.S. narrative. If the core weapons program had been halted, then why did the obsession continue with such intensity?

Because the deeper concern was not simply a bomb. It was capability, independence, deterrence, and strategic autonomy. Washington feared an Iran that could master the nuclear fuel cycle, shorten breakout timelines, expand missile deterrence, inspire anti-U.S. movements, and resist the U.S.-Israel regional order, even without crossing the final threshold to assemble a weapon.

That is why the issue survived even when intelligence complicated the case for imminent weaponization. �
Arms Control Association +1

5. 2006 to 2013: sanctions as strategic warfare

By the mid-2000s, the nuclear issue had become the legal and diplomatic foundation for a broad coercive architecture. UN action, U.S. sanctions, financial restrictions, and secondary sanctions were used not only to constrain Iran’s nuclear activities but also to damage Iran’s economy and reduce its regional reach. U.S. officials repeatedly framed prevention of an Iranian nuclear weapon as a core national security objective, while sanctions became a much wider tool of state pressure. �
State.gov +2

The result was clear: the nuclear program served as the most internationally marketable reason to isolate Iran, even though Washington’s wider concerns also included Iran’s missiles, regional alliances, and ideological influence. Congressional Research Service summaries have long reflected this broader U.S. concern set, not just the nuclear file. �
everycrsreport.com

6. 2015: the JCPOA proved diplomacy was possible

The Joint Comprehensive Plan of Action of July 2015 was a decisive moment because it demonstrated that the issue could be managed through intrusive monitoring, negotiated caps, and reciprocal commitments.

The U.S. itself described the JCPOA as an arrangement to ensure Iran’s nuclear program would remain exclusively peaceful, and the IAEA took on a central verification role. �
2009-2017.state.gov +2

This matters because the JCPOA undercut the argument that only maximal pressure could address the problem. Diplomacy had produced a verifiable framework. If Washington’s concern had been purely non-proliferation, the logical course would have been to preserve and strengthen that framework.

7. 2018: U.S. withdrawal exposed the real agenda

When President Trump withdrew the U.S. from the JCPOA on 8 May 2018, the contradiction became impossible to ignore. The official U.S. justification was that the agreement failed to protect American national security interests.

Soon after, the administration broadened its demands far beyond the nuclear file. The issue was no longer just enrichment levels or inspection regimes. It became part of a much larger strategy to roll back Iran’s regional power and force political capitulation. �
2017-2021-translations.state.gov +2

This was a turning point in understanding the obsession. If a functioning agreement existed, and Washington abandoned it, then the objective was not merely to stop proliferation.

It was to deny Iran any pathway to normal strategic legitimacy while maintaining U.S. coercive leverage.

8. After withdrawal: the crisis was recreated by policy

After the U.S. left the deal, Iran progressively reduced compliance and expanded enrichment. By May 2025, the IAEA reported Iran’s stockpile included 408.6 kg enriched to up to 60% U-235, alongside larger stocks at lower enrichment levels. Reuters, citing IAEA benchmarks, reported that this quantity of 60% material represented enough, if enriched further, for several nuclear weapons. �
IAEA +2

The crucial point is causal: the post-JCPOA escalation did not emerge in a vacuum. It followed the U.S. decision to destroy the very agreement designed to contain the program. Washington helped recreate the crisis, then cited the worsened crisis as proof of Iranian danger. �
2017-2021-translations.state.gov +2

9. Why the obsession persists: five real reasons

A chronological record points to five deeper motives behind the U.S. obsession.

First: preserving U.S. regional hegemony.
An Iran with advanced nuclear infrastructure, even short of a bomb, is harder to intimidate, sanction, or isolate. Such an Iran can negotiate from strength. That is incompatible with a regional order dominated by Washington. �
everycrsreport.com +1

Second: protecting Israel’s strategic supremacy.
Although the U.S. presents the issue as global security, the Iran file is inseparable from Israeli security doctrine. Washington has long treated Iranian strategic advancement as a direct challenge to Israel’s qualitative military edge and regional freedom of action.

This is a geopolitical reading, even when framed in non-proliferation language. �
everycrsreport.com +1

Third: preventing an independent deterrent model.

The U.S. is deeply wary of states that combine technological capacity, missile reach, ideological autonomy, and resistance to Western pressure. Even without assembling a bomb, Iran’s near-threshold capability can function as strategic deterrence. That reduces U.S. coercive power. �
Arms Control Association +1

Fourth: weaponizing the nuclear issue for sanctions and legitimacy.

Among all possible files, human rights, missiles, regional alliances, the nuclear issue is the most effective for building multilateral pressure. It gives Washington diplomatic legitimacy for broader containment policies. �
2009-2017.state.gov +1

Fifth: regime-change logic by another name.
At key moments, U.S. policy moved from preventing weaponization toward demanding structural surrender. That is why debates after 2018 often expanded from nuclear limits to Iran’s foreign policy, missile doctrine, and regional posture. The obsession was not about one program alone. It was about taming or transforming the state behind the program. �
State Department +1

10. The 2025 to 2026 phase: obsession after war

Recent developments make the pattern even clearer. In 2025, the IAEA Board adopted another resolution pressing Iran over safeguards cooperation, and later reports reflected growing concern over stockpiles, access, and verification. In April 2026, Reuters reported that U.S.-Iran talks had shifted toward an interim arrangement after military confrontation, with major disputes still centering on highly enriched uranium, duration of restrictions, and Iran’s insistence on its right to peaceful enrichment.

AP also reported the IAEA chief warning that any deal without strict verification would be meaningless. �
IAEA +3

What this shows is profound: even after war, coercion still circles back to the same question, who gets to decide whether Iran may retain strategic technological sovereignty?

The U.S. answer has effectively been: not Iran itself.

Conclusion

The American obsession with Iran’s nuclear program is not explained fully by non-proliferation. If it were, the historical record would look different. Washington accepted nuclear ambition under the Shah, escalated hostility after the Revolution, continued pressure even after intelligence judgments complicated claims of active weaponization, negotiated a workable deal in 2015, then abandoned that deal in 2018 and widened its demands. �
history.state.gov +3

The consistent thread is this: the U.S. does not merely fear an Iranian bomb. It fears an Iran that cannot be subordinated.

That is why the nuclear file has endured as a permanent battlefield. It is the most convenient legal and diplomatic vocabulary for a larger geopolitical project: preserving American primacy, shielding Israeli strategic dominance, and preventing the rise of an independent regional power that refuses to bend.