Whether this approach will work is not yet clear. Years of sanctions have failed to stop other murderous regimes from staying in power and waging war. Punishing Russia in a manner so harsh, sweeping, and shaped as much by “do something!” outrage as by carefully calculated strategy, may cause Russians to rally around Putin, or provoke further escalation, or harm the global economy in immiserating ways that make war elsewhere more likely. Or it may work, or at least prove less terrible than any of the other terrible options that are available.