British historian, author, and formulator of “Parkinson's Law,” the satiric dictum that “Work expands to fill the time available for its completion.” A relatively obscure academic prior to the enunciation of his “law,” which first appeared in an essay in the London Economist in 1955, Parkinson later devised a second law, “Expenditure rises to meet income,” detailed in The Law and the Profits (1960).

After receiving a Ph.D. in history from Kings College, London, in 1935, Parkinson taught at various schools in England and, from 1950 to 1958, in Malaya (now Malaysia). He based his comments regarding the nature of bureaucracy on his experiences as a British army staff officer during World War II. Administrators make work for each other, he said, so that they can multiply the number of their subordinates and enhance their prestige. His second law was intended as a jibe at government functionaries, who he thought were inclined to expand their own ranks indefinitely, so long as taxes could be raised. Written in a deadpan but mercilessly funny style, Parkinson's Economist essays were issued in book form in Parkinson's Law, or The Pursuit of Progress (1958). Apart from the books that made him famous, Parkinson wrote numerous historical works, including the critically acclaimed The Evolution of Political Thought (1958).