In 1999, two Chinese colonels wrote a book called Unrestricted Warfare, about warfare in the age of globalization. Their main argument: Warfare in the modern world will no longer be primarily a struggle defined by military means — or even involve the military at all.

They were about a decade and a half before their time.

Colonels Qiao Liang and Wang Xiangsui argued that war was no longer about “using armed forces to compel the enemy to submit to one’s will” in the classic Clausewitzian sense. Rather, they asserted that war had evolved to “using all means, including armed force or non-armed force, military and non-military, and lethal and non-lethal means to compel the enemy to accept one’s interests.” The barrier between soldiers and civilians would fundamentally be erased, because the battle would be everywhere. The number of new battlefields would be “virtually infinite,” and could include environmental warfare, financial warfare, trade warfare, cultural warfare, and legal warfare, to name just a few. They wrote of assassinating financial speculators to safeguard a nation’s financial security, setting up slush funds to influence opponents’ legislatures and governments, and buying controlling shares of stocks to convert an adversary’s major television and newspapers outlets into tools of media warfare. According to the editor’s note, Qiao argued in a subsequent interview that “the first rule of unrestricted warfare is that there are no rules, with nothing forbidden.” That vision clearly transcends any traditional notions of war.