“At the end of the 1940s, when it was becoming clear to him that the effort to control nuclear weaponry would fail, Einstein was asked what the next war would look like. “I do not know how the Third World War will be fought,” he answered, “but I can tell you what they will use in the Fourth – rocks.”20 Russia.”

“At the end of the 1940s, when it was becoming clear to him that the effort to control nuclear weaponry would fail, Einstein was asked what the next war would look like. “I do not know how the Third World War will be fought,” he answered, “but I can tell you what they will use in the Fourth – rocks.”20 Russia.”

— Walter Isaacson