Chalmers Ashby Johnson (August 6, 1931 - November 20, 2010) 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 1967–1973, and chaired the Center for Chinese Studies at the University of California, Berkeley from 1967 to 1972. He was also president and co-founder of the Japan Policy Research Institute (now based at the University of San Francisco), 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.
Johnson was born in 1931 in Phoenix, Arizona. He earned a B.A. degree in Economics in 1953 and an M.A. and a Ph.D. in political science in 1957 and 1961 respectively. Both of his advanced degrees were from the University of California, Berkeley. During the Korean War, Johnson served as a naval officer in Japan. He taught political science at the University of California from 1962 until he retired from teaching in 1992. He was best known early in his career for his scholarship on the