Third, they imply that the odds of nuclear war might be higher today than in the Soviet era, because Russia is much weaker. The Soviet Union simply had more ground to give up in a conventional war before defeat appeared existential than does Putin’s smaller empire — which may be a reason why current Russian strategy increasingly prioritizes tactical nuclear weapons in the event of a conventional-war retreat.

But if that makes our situation more dangerous, it also should give us confidence that we don’t need to take wild nuclear risks to defeat Putin in the long run. The voices arguing for escalating now because we’ll have to fight him sooner or later need to recognize that containment, proxy wars and careful line-drawing defeated a Soviet adversary whose armies threatened to sweep across West Germany and France, whereas now we’re facing a Russian army that’s bogged down outside Kyiv.

We were extremely careful about direct escalation with the Soviets even when they invaded Hungary or Czechoslovakia or Afghanistan, and the result was a Cold War victory without a nuclear war. To escalate now against a weaker adversary, one less likely to ultimately defeat us and more likely to engage in atomic recklessness if cornered, would be a grave and existential folly.