Hesitate and you fall; commit to repression and you might survive. That's the lesson the Iranian regime took from watching the Shah waver his way out of power, and it shapes everything. Their dominant strategy in a domestic-only game is brutal crackdown, maximum force until the protests exhaust themselves. History backs this up—authoritarian regimes that waver tend to collapse, while those that commit fully often hold on.

But the regime isn't playing alone. The protesters are running a classic coordination game with a tipping point. If enough people protest, the regime can't arrest everyone and the security forces might defect. If too few show up, everyone who does gets killed or imprisoned. Each individual's best move depends entirely on their beliefs about what others will do. The equilibrium is either "mass sustained protest" or "stay home"—the middle ground is unstable. Right now they're trying to push past the tipping point, and the regime is trying to prevent that threshold from being reached through selective, terrifying violence.

The US is the wildcard. Amassing troops and threatening action creates multiple possible interpretations. The regime might read it as: "If we crack down too visibly, we invite intervention"—modulating their behavior at the margins, fewer public atrocities, more quiet disappearances. Or they might read it as domestic posturing and ignore it entirely. Or—and this is the dangerous one—they might read it as: "We're going to be attacked anyway, so we might as well accelerate nuclear development as a deterrent." Which interpretation wins depends on American credibility—badly degraded by decades of unenforced "red lines," but the regime can never be sure which president will be the one who actually means it.

The most likely stable outcome is grim: regime survives through sustained repression, the US doesn't intervene in the domestic situation, protests eventually exhaust themselves. Most authoritarian crackdowns end here, and the historical base rate favors it if the US threat isn't credible and protesters can't maintain coordination over months or years.

The alternative stable point is regime change, but that requires the coordination game to tip—which usually needs a focal event, something that makes everyone simultaneously believe everyone else will show up tomorrow. A martyr whose name becomes a rallying cry. A defection by a visible general. These moments are impossible to predict but unmistakable when they arrive.

US intervention could theoretically change the payoff structure entirely, making regime survival strategies that work against domestic protest suddenly inadequate. But the Iraq precedent looms so large—massive uncertainty about what comes after—that American policymakers have been deeply reluctant to roll those dice again. The troop buildup reads less like preparation for regime-change intervention and more like deterrence against nuclear breakout. Which means the most plausible trajectory is managed stalemate: regime cracks down hard enough to survive, US accepts a near-threshold Iran as preferable to war, protests continue at low burn. Everyone adjusts to a bad situation because the alternatives look worse.

Here's what that means for the protesters: they're fighting a coordination problem that probably won't tip without external support or security-force fracture, and the current equilibrium provides neither. The base rate says they lose. But base rates are just histories of past games, and every revolution that succeeded looked impossible until a general defected or a name caught fire and everyone suddenly believed everyone else would show up.