In just over 30 years, Tehran's population exploded from 500,000 to nearly 5 million. This rapid, oil-fueled urbanization overwhelmed infrastructure and created a vast, alienated urban class, forming a fertile ground for revolutionary discontent.

Unlike historical conflicts with pitted armies, a contemporary American civil war would manifest as exploding political violence. The key dynamic is that state attempts to suppress this violence would themselves become a primary cause for more violence, creating a dangerous feedback loop seen in conflicts in Algeria, Vietnam, and Syria.

The Iranian Revolution was fueled by a Shia worldview centered on martyrdom, cosmic struggle between good and evil, and an apocalyptic final battle. U.S. policymakers, lacking any understanding of this religious framework, were completely unprepared for its political power.

With its credibility destroyed by bloodshed, the Iranian regime's only remaining leverage over some citizens is the fear of a chaotic power vacuum. The prospect of a full-blown civil war may convince some to tolerate the current oppression over the alternative of total state collapse.

When a government cuts off internet and phone lines during massive protests, as seen in Iran, it's a clear indicator they are trying to conceal the severity of their response from the world. This tactic undermines their own claims of control and reveals a deep fear of international scrutiny.

In times of extreme polarization, the political middle is not a safe haven but a kill zone. Moderates are targeted by both sides because they have no tribe to defend them. The escalating cost of neutrality forces everyone to pick a side, eliminating compromise and accelerating conflict.

The progression of protest slogans from demanding a vote recount in 2009 ('Where is my vote?') to calling for regime overthrow today ('Death to the supreme leader') indicates a fundamental change. Protestors no longer seek to work within the existing system but aim to dismantle it entirely.

The current Iranian protests are uniquely potent because the regime is at its weakest geopolitically. The loss of regional proxies like Hezbollah and Hamas, coupled with key ally Russia's preoccupation with Ukraine, has left the Iranian government more isolated and vulnerable than during any previous wave of unrest.

Ayatollah Khomeini's political genius was blending traditional religious conservatism with the era's fashionable anti-colonial nationalism. By framing the Shah as an American and Israeli puppet, he mobilized a broad coalition beyond just the deeply religious.