Introduction
Iran enters 2026 at a critical juncture. Severe internal repression, economic collapse, and regional weakness now intersect with explicit U.S. red lines, leaving very little room for missteps or misjudgment. This escalation stems directly from the collision between Iran’s domestic and regional policies on one side, and Washington’s firm stance on the other. The danger lies not in inevitable war, but in escalation driven by miscalculation—both within Iran itself and in the tense dynamic between Tehran and Washington. This article explores how Iran’s internal dynamics could spiral into broader conflict and under what conditions the United States might shift from calibrated pressure to direct action.
The protest movement that erupted in late December 2025, triggered by hyperinflation, currency collapse, and rising food prices, quickly transformed into a nationwide challenge to the Iranian regime. What began with merchant closures in Tehran spread to universities, major cities, and long-marginalised regions, reflecting accumulated anger over economic mismanagement and political exclusion.
The regime responded with its harshest repression since 1979. Actions included a near-total internet blackout beginning in early January, mass arrests exceeding 26,000 cases, and widespread use of live ammunition. Iran International, citing senior security insiders, reported at least 12,000 deaths during the initial crackdown, primarily over two nights in early January. Subsequent estimates from medical sources cited by the UN Special Rapporteur on Iran suggest civilian deaths may exceed 20,000, far above official figures. Euro News has also reported that the death toll could surpass 30,000. While exact figures remain contested due to information blackouts and restricted access, all credible sources agree that the scale of violence is unprecedented in the regime’s recent history.
Despite this violence, unrest persists. Strikes, nighttime protests, and regional flashpoints continue, particularly in non-Persian areas such as Kurdistan and Ahwaz, revealing the regime’s underlying vulnerability.
Externally, Iran faces pressure following U.S.–Israeli strikes on nuclear facilities in June 2025 and growing concern over nuclear reconstruction amid restricted IAEA access. Simultaneously, Washington has set out clear red lines. Together, these factors—internal crisis and external thresholds— combine to create conditions ripe for escalation, even in the absence of deliberate plans for war.
Iran’s Pressure Environment: Internal and External
Iran’s current instability stems from long-term structural failures. Over the past decades, the regime has failed to provide basic living standards, economic stability, or political inclusion. As a result, protest movements have grown steadily larger and more confrontational. The November 2019 fuel protests marked a turning point: Reuters documented at least 1,500 deaths caused by security forces, with later estimates suggesting even higher casualties in certain provinces. The Mahsa Amini protests of late 2022 lasted nearly three months and resulted in at least 551 confirmed deaths, including many minors (Iran Human Rights; UN).
The December 2025–January 2026 uprising surpassed previous protests in both scale and intensity. Sparked by economic collapse, it quickly transformed into widespread calls for regime change across diverse social classes and regions. The regime responded with mass arrests, lethal force, and prolonged digital isolation—demonstrating a leadership increasingly dependent on coercion rather than consent.
Non-Persian regions remain central to this crisis. Kurdish, Ahwazi Arab, Baloch, and Azerbaijani areas combine deep grievances with geographic depth and organisational capacity. Most of these people seek greater freedom—including, for some, self-determination and an end to what they view as Iranian occupation of their lands. Heavy reliance on IRGC deployments in these regions strains state resources and exposes the limits of central control, deepening political and ethnic divisions. Sustained unrest increases the risk that repression fuels resistance rather than deterrence, accelerating fragmentation instead of restoring order.
Regionally, Iran’s position has weakened. Hezbollah’s capabilities have been degraded following sustained conflict with Israel; the Assad regime’s collapse in late 2024 severed Iran’s land corridor to the Levant, and allied militias in Iraq and Yemen face increasing containment. While Tehran continues efforts to rebuild missile and proxy capacity, its ability to deter adversaries or retaliate indirectly has narrowed.
Escalation Pathways Inside Iran
Escalation within Iran does not require a foreign invasion or an organised rebellion. It can arise organically from the regime’s own response to persistent domestic pressure. As economic collapse worsens and public dissent spreads, the regime has increasingly portrayed protests as armed, foreign-backed, or subversive. This framing serves to justify the use of extreme force and to discourage undecided segments of society from joining the demonstrations.
“The regime’s greatest fear is not protest itself, but the moment repression convinces people they have nothing left to lose,” said Yousef Azizi Bani-Torof, an Ahwazi writer and political commentator, in an interview for this article.
In his assessment, the ruling system—centred on Supreme Leader Ali Khamenei—has little incentive to de-escalate. With only a small segment of society still inclined to support the regime, violence has become its primary instrument of survival. “The leadership understands that its trajectory is effectively a dead end,” he argued. “Whether the system collapses under public pressure or through foreign intervention following an attack on Iran, the outcome is bleak.”
According to Azizi Bani-Torof, Khamenei’s political future is constrained by the scale of violence committed under his authority. While the precise timing of collapse is impossible to predict, he noted that the Supreme Leader’s ideological rigidity, sectarian worldview, and reliance on coercion make voluntary retreat unlikely. Even extraordinary events—such as assassination or arrest—would not automatically end repression, as the Islamic Revolutionary Guard Corps (IRGC) would likely continue using lethal force against protesters.
For this reason, Azizi Bani-Torof emphasised that the decisive variable is not the fate of a single individual but the cohesion of the ruling elite. “A serious fracture within the power structure,” he said, “would significantly weaken the system and could ultimately lead to its collapse.”
To date, protests have remained overwhelmingly non-violent, relying on strikes, chants, and symbolic acts of resistance. However, sustained lethal repression alters incentives. In marginalised regions in particular, communities may begin to view defensive arming not as rebellion but as survival. This is the pathway through which localised confrontations risk evolving into broader conflict.
The violence of January 2026 marked a critical turning point, surpassing the scale and intensity of repression seen during the 2019 fuel protests and the 2022 Mahsa Amini uprising. Human rights monitors confirmed thousands of deaths, while medical sources cited by the United Nations indicated an even higher civilian toll. Internet shutdowns, mass arrests, and the deployment of IRGC units alongside foreign-linked militias demonstrated the regime’s readiness to escalate force without restraint. Yet repression carries limits: excessive violence risks eroding loyalty within security forces, alienating regime supporters, and intensifying international scrutiny.
“Every escalation narrows the regime’s exit options,” Azizi Bani-Torof observed. “Once fear replaces legitimacy, control becomes expensive and unstable.” In practice, this means that each additional act of repression reduces the regime’s ability to compromise or de-escalate without appearing weak. As governance shifts from consent to coercion, the costs of control rise, elite cohesion weakens, and long-term stability becomes harder to sustain.
Underlying this approach is fear of fragmentation. The regime is acutely aware of the Syrian precedent, where prolonged unrest hollowed out state authority from within. Fragmentation in Iran would likely be gradual: hesitancy among mid-level commanders, local officials disengaging, and security forces prioritising self-preservation. Ironically, efforts to prevent this outcome may accelerate it.
Non-Persian regions are decisive in this process. Their borderland geography complicates force concentration and raises the risk of spillover. As resources are diverted to contain unrest in these areas, control elsewhere weakens, creating space for broader instability.
Non-Persian regions carry additional strategic weight because they are structurally connected to the world beyond Iran’s borders. These populations inhabit every frontier of the state: Kurds maintain deep social and political ties with Iraqi Kurdistan; Azerbajani Turks are linked to Turkey and Azerbaijan; Turkmen to Turkmenistan; Baluch to Afghanistan and Pakistan, and in the south, coastal areas open directly onto the Sea of Oman. Ahwazi Arabs are embedded within a broader Arab milieu, with linguistic, cultural, and political connections that extend across Iraq, the Arabian Gulf, and into the wider Arab world. Such cross-border linkages complicate the regime’s containment strategy, raising the risks of spillover, external attention, and indirect support networks that Tehran cannot fully control.
Beyond geography, non-Persian populations tend to mobilise rapidly because their demands are clear, shared, and long-standing. Claims related to political representation, civil rights, cultural recognition, economic inclusion, and language rights allow for faster internal consensus and the emergence of representative leadership. Several of these groups also possess historical experience of armed confrontation with the Iranian state—notably Kurdish, Ahwazi Arab, and Baloch movements—giving them organisational memory and tactical knowledge that differentiates them from protest movements in central Iran. As a result, when repression in these regions escalates to mass killings or collective punishment, the risk of protest evolving into organised resistance increases significantly. In this context, violence against non-Persian protests not only fails to quell dissent but also raises the likelihood of sustained confrontation, further straining the regime’s coercive capacity and accelerating internal instability.
U.S. Red Lines and Decision Thresholds
During the Trump administration, Washington adopted a strategy of calibrated pressure—sanctions, naval deployments, backchannel diplomacy, and public warnings—while deliberately avoiding open conflict. This approach prioritised compelling behavioural change over immediate regime change. However, this restraint has always been conditional, not indefinite. It relies on Iran’s continued—if limited—compliance with clearly defined behavioural thresholds. Washington’s restraint is a calculated choice, not a sign of hesitation; the aim is to shape outcomes through pressure without immediate recourse to force. Should Tehran cross established red lines—such as mass civilian killings, renewed nuclear activities, or attacks on U.S. personnel and allies—this restraint is expected to yield to direct action. In this sense, U.S. restraint serves as a warning period rather than a guarantee of non-intervention, placing responsibility for escalation squarely on the regime’s choices.
President Trump has repeatedly warned that systematic violence against civilians would provoke a strong U.S. response, framing the issue in explicit humanitarian terms. Reports that U.S. pressure led to the suspension of hundreds of planned executions demonstrate how this threshold can influence events, even when enforcement does not involve immediate military action. However, Iran has denied Trump’s claim.
A second red line involves nuclear reconstitution. Following the June 2025 strikes on Natanz and Fordow, any verified attempt to rebuild centrifuges, resume high-level enrichment, or expand missile production would likely prompt pre-emptive action (Iran International). A third trigger concerns attacks on U.S. personnel or allies. Missile strikes, Houthi disruption of shipping lanes, or renewed Hezbollah escalation would almost certainly prompt rapid retaliation. The repositioning of U.S. carrier groups underscores this deterrent posture.
This perspective is echoed by Irina Tsukerman, a human rights and national security attorney and analyst, who contends that the United States relies not on abstract red lines but on behaviour-based thresholds that resolve internal debate once crossed. The most decisive threshold is Iran’s shift from a nuclear threshold posture to clear weaponisation—such as expelling inspectors, pursuing covert enrichment, or signalling intent to build a bomb.
Equally critical is the killing of Americans, whether directly or through Iranian-directed proxies. Tsukerman notes that while Washington has tolerated low-level proxy activity in the past, a high-casualty incident involving U.S. personnel would almost certainly trigger rapid retaliation to restore deterrence.
She further identifies mass executions and large-scale lethal repression as a politically charged red line. While human rights abuses alone do not automatically lead to military action, Tsukerman argues that when a U.S. president publicly links executions or mass killings to consequences, the issue shifts from values to credibility. At that point, restraint becomes politically costly.
Domestic politics also matter. Graphic media coverage of repression or intelligence disclosures can rapidly lower the political threshold for action, particularly in an election-sensitive environment. “Once repression becomes globally visible and explicitly tied to U.S. warnings, it stops being an internal matter and becomes a test of deterrence,” Tsukerman observes.
Tsukerman stresses that domestic unrest matters not because Washington expects to engineer regime change from outside, but because internal repression reshapes the policy environment. Mass killings, executions, and internet blackouts narrow diplomatic space by making engagement harder to justify domestically in the United States. Furthermore, these actions raise significant doubts regarding the regime’s rationality and reliability, which in turn strengthens the arguments for applying coercive pressure. However, she cautions that domestic unrest alone does not trigger intervention. What matters is the intersection of repression with other threats: nuclear escalation, proxy violence, or attacks on U.S. interests.
Together, these red lines clarify how Washington shifts from restraint to action: they are specific, publicly articulated, and directly tied to behaviour that threatens U.S. interests, values, or security. Responses are designed to be forceful yet limited, preserving diplomatic options while enforcing boundaries in an increasingly unstable environment.
Scenario Analysis
Multiple pathways emerge from the current convergence of internal unrest, regional dynamics, and U.S. strategic calculations. The first centres on a calibrated use of force designed to impose costs without triggering systemic collapse. In this scenario, external military pressure would be deliberately limited in scope, tempo, and objectives—focusing on degrading coercive capabilities and signalling credible deterrence rather than seeking decisive political transformation. This approach aims to reshape regime behaviour—particularly regarding internal repression, nuclear activity, and regional conduct—while preserving a degree of internal order and limiting spillover effects. The underlying assumption is that controlled coercion can still influence decision-making in Tehran without unleashing forces that Washington and its partners cannot manage.
A second pathway emerges less from deliberate intent than from miscalculation. Under mounting pressure, limited external actions could combine with domestic fragmentation to rapidly accelerate internal militarisation. Protest movements might harden into armed confrontations, institutional cohesion could break down, and the state’s ability to reassert control could weaken unevenly across regions. In this scenario, escalation would become self-reinforcing: external strikes provoke internal retaliation, internal violence prompts further external involvement, and diplomatic containment mechanisms fail to keep pace. Such fragmentation would likely appear first in peripheral and non-Persian regions, where repression, geography, and organisational memory most strongly interact.
The third scenario envisions regime change resulting from prolonged, cumulative weakening rather than a single decisive event. In this case, Washington implicitly—rather than explicitly—accepts regime change as a possible strategic outcome, without endorsing a specific path to that end. Military action may contribute, but not necessarily through invasion or an overt attempt to overthrow the regime. Instead, collapse would result from sustained pressure: economic exhaustion, elite fragmentation, erosion of coercive power, and internal political realignment. This pathway leaves open critical questions about succession and post-regime governance. Here, regime change is not directly engineered but emerges from a drawn-out process of attrition that ultimately renders the existing system unsustainable.
Tsukerman argues that the current U.S. approach is best understood as managed weakening, not explicit regime change. Washington prefers to degrade the regime’s capacity to repress internally and destabilise externally—through sanctions enforcement, deterrence, and selective strikes—while avoiding ownership of Iran’s political future. This strategy reflects risk management rather than moral ambivalence.
She identifies three key constraints shaping U.S. caution: the lack of a unified opposition leadership, the continued cohesion of Iran’s security apparatus, and the high risk of regional spillover.
Policy Implications
The current crisis presents Washington with difficult but actionable choices. Effective policy must balance deterrence, sequencing, and control of unintended consequences. A large-scale invasion would require massive mobilisation and risk prolonged instability. A more realistic approach involves phased regime weakening: sustained economic pressure, support for internal opposition—particularly among organised non-Persian groups—the dismantling of proxy networks, prevention of nuclear advancement, and the degradation of coercive capacity.
According to Tsukerman, weakening the regime is currently viewed as the less risky option, though not necessarily the ultimate goal. She notes that overt regime-change declarations often unify authoritarian systems and justify extreme repression. In contrast, weakening strategies aim to erode elite cohesion, drain the resources that sustain repression, and increase internal friction over time. “Regime change becomes thinkable only when the system begins to break from within; forcing it prematurely risks chaos without control,” she concludes.
Nevertheless, Tsukerman acknowledges that circumstances could change. Should elite fractures emerge, security forces defect, or repression escalate into internationally undeniable atrocities, U.S. policy calculations may shift.
Sanctions alone risk entrenchment and increased civilian suffering. Military deterrence without economic pressure risks short-term disruption without lasting strategic effect. Combined, however, these measures can raise pressure to a level where internal dynamics become decisive.
Risk management requires precision, multilateral coordination with regional partners and Europe, humanitarian safeguards, and intelligence efforts focused on senior political, military, and nuclear leadership.
Conclusion
While Iran is intent on avoiding direct military confrontation with the United States, its actions repeatedly test established red lines. The greatest danger stems less from deliberate escalation than from the interaction between internal repression, regime insecurity, and inflexible international boundaries. Each act of violence within Iran heightens the risk that these thresholds will be crossed externally.
For Washington, restraint is a choice, not a binding commitment. The coming months will reveal whether Iran continues to test these boundaries. If the regime persists in crossing them, the United States is likely to respond militarily—not necessarily with an invasion, but through decisive actions intended to shift the balance of power within Iran.
Such measures could range from swift, targeted strikes to weaken the regime and eliminate key political, military, and security leaders, to a broader, coordinated campaign aimed at accelerating the collapse of an increasingly fragile system. Whether justified as deterrence or necessity, this would mark a transition from managing escalation to actively shaping its outcome.
In this sense, Iran’s crisis is approaching a point of irreversibility. The question is no longer whether pressure will intensify, but whether the regime can avoid triggering a response that transforms internal repression into an external reckoning.
Kamil Alboshoka is an Ahwazi researcher and international law specialist at the Dialogue Institute for Research and Studies.
References
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House of Commons Library. “Two-year anniversary of the Mahsa Amini protests in Iran.” By Philip Loft. September 19, 2024. https://commonslibrary.parliament.uk/two-year-anniversary-of-the-mahsa-amini-protests-in-iran/
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