While this book deals largely with the “Seven Sisters” of cyber conflict—the United States, Russia, China, Britain, Iran, Israel, and North Korea—nations from Vietnam to Mexico are emulating the effort. Many have started at home by testing their cyber capabilities against dissidents and political challengers. But no modern military can live without cyber capabilities, just as no nation could imagine, after 1918, living without airpower. And now, as then, it is impossible to imagine fully how dramatically this invention will alter the exercise of national power.
