Cyril Northcote Parkinson was a British naval historian and author, best known for his work on management and organizational theory. He gained fame for formulating Parkinson's Law, which states that "work expands to fill the time available for its completion." This concept highlights inefficiencies in bureaucratic systems and has influenced management practices. Born on July 30, 1909, in Barnard Castle, England, Parkinson served in the Royal Navy during World War II. He later became a professor at Queen's University Belfast and published several books, including "Parkinson's Law: The Pursuit of Progress," which explores the dynamics of organizational behavior.