French president Emmanuel Macron caused quite a stir with his recent statement¹ that France would not retaliate with nuclear weapons against Russia if the Kremlin launched a nuclear strike on Ukraine. A follow-on tweet² from his official Twitter account saying “we do not want a world war” only added to the backlash on social media. While this messaging was in line with that from other allies—and did not express any intention to abandon Ukraine for the sake of avoiding a nuclear war—it was widely interpreted as, at the very least, undermining deterrence³. Although some of the harsher reactions are quite misguided, the episode raises a legitimate question about whether the French nuclear deterrent carries much weight in protecting Europe as a whole from rogue nuclear regimes.
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