Should European members of Nato be rearming in the face of the Russian threat? And if not, I ask Carlo Rovelli, why not? The Italian theoretical physicist seems a good person to answer these questions since his timely new book, 85 Seconds to Midnight, is subtitled A Physicist’s Argument against Rearmament.Rovelli, 70, brown eyed, genial, with enviably luxuriant grey locks, removes his glasses before answering. “The idea of the Russian military being a threat to Europe is ridiculous. Russia can’t even get to Kyiv! A few years ago, Russia had 4% of the world’s military spending and Nato had 40%.”At...