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.
Two Chinese Colonels even wrote a book about it way back in 1999.
https://warontherocks.com/2016/04/a-new-generation-of-unrestricted-warfare/