Iran is at a critical inflection point as its aging and ill Supreme Leader, Ayatollah Khamenei, has no clear successor. The constitutional requirements for the role were tailored specifically for his predecessor, Khomeini. With no one in the wings who meets the criteria, the country faces significant instability upon his death.

Despite widespread protests, Iran's repressive state apparatus is highly effective and has shown no signs of cracking. The probability of the regime collapsing from internal pressure alone is extremely low. Niall Ferguson argues that only external intervention, a form of 'regime alteration,' can realistically topple the Islamic Republic.

A destabilized Iranian regime is more dangerous, not less. Israeli intelligence fears Tehran might launch a strike on a foreign enemy like Israel to distract its populace, create a "rally 'round the flag" effect, and restore military pride after recent setbacks.

Fears of ethnic fragmentation are a regime talking point, not a likely reality. Unlike 20th-century states, Iran has a 2,500-year history that forged a strong national identity. Even repressed ethnic minorities like Kurds and Azeris largely see themselves within the fabric of a unified Iran.

Beyond the immediate conflict, Israeli strategists see a long-term opportunity. If the current regime falls, they hope to restore the strong alliance that existed with non-Arab Iran before the 1979 Islamic Revolution, which was based on shared regional interests.

A clean, external removal of Iran's leadership, similar to what occurred in Venezuela, is unlikely. Iran's population is nearly four times larger, it is geographically distant, and the American political psyche associates the Middle East with costly military entanglements, creating a much higher barrier to intervention.

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.

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.

Despite widespread internal protests and instability, history shows that an external attack is one of the few things that can unify the Iranian population. A potential Israeli strike, meant to weaken the regime, could backfire by creating a 'rally 'round the flag' effect that shores up support for the Ayatollah.