Chalmers Ashby Johnson was an American author and professor emeritus of the University of California, San Diego. He served in the Korean War, was a consultant for the CIA from 1967 to 1973, and chaired the Center for Chinese Studies at the University of California, Berkeley from 1967 to 1972. He was also president and co-founder with Steven Clemons of the Japan Policy Research Institute, an organization promoting public education about Japan and Asia. He wrote numerous books including, most recently, three examinations of the consequences of American Empire: Blowback, The Sorrows of Empire, and Nemesis: The Last Days of the American Republic. A former cold warrior, his fears for the US changed: "A nation can be one or the other, a democracy or an imperialist, but it can't be both. If it sticks to imperialism, it will, like the old Roman Republic, on which so much of our system was modeled, lose its democracy to a domestic dictatorship. "

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