During the Cold War, many political scientists and military experts warned that if World War 3 was fought with buttons, World War 4 would be fought with sticks and stones. The point was that if World War 3 went nuclear, it would be so devastating that the next global conflict would be much more low-tech. The Cold War ended in the early 1990s, when the Soviet Union and the Eastern Bloc fell apart. But 2024 is full of major political tensions, from the Israel-Hamas War to Russia’s ongoing invasion of Ukraine. READ MORE: ‘Oppenheimer’ is a disappointment − and a lost opportunity In her new book, …