Washington has changed weapons. It has not changed its problem. On 24 August, Treasury Secretary Scott Bessent stood before reporters and announced what officials had spent ten days branding as an “economic D-Day” against Iran. He called it “Operation Economic Outcast.” He promised to “sever every economic lifeline that sustains this tyrannical regime until Tehran stands alone.” The military campaign had stalled. The financial one now carries the weight instead.

A threat without a timeline

Bessent’s language left no room for ambiguity. He warned that any entity helping Iran launder money “will be removed from the US dollar system,” adding that “the clock just started ticking.” But he named no countries. He set no deadline. When a reporter pressed him on whether Chinese banks might be targeted, given that China buys roughly 90 percent of Iran’s oil, he offered only a warning that “no one is above the reach of US sanctions.” He also admitted the obvious limit on his own leverage: “Why would I want to blow up the global financial system?”

That single line does more to explain American strategy than the entire press conference around it. Washington needs a threat big enough to frighten Tehran’s trading partners, but not so big that it destabilises the system the threat depends on. It is coercion with a built-in ceiling, and Iran’s leadership has learned to read where that ceiling sits.

The human cost lands first

Ordinary Iranians felt the pressure before any sanctions took effect. The rial collapsed........

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