Parkinson's Law

“Work expands so as to fill the time available for its completion.”

The observation was first published by British naval historian C. Northcote Parkinson in a satirical essay in The Economist in November 1955, later expanded into the book Parkinson’s Law (1957). It was written as satire in response to the report of the Royal Commission on the Civil Service, but despite its facetious origins, it has been widely adopted in management science and social psychology.

The implication is practical: if you give a task a week, it will take a week. Give it two days, and it will take two days. Deadlines don’t just constrain work — they shape it.