Source
The Peter Principle
A humorous book by Laurence J. Peter and Raymond Hull, published in 1969, on how organisations work. Its central claim is that in a hierarchy every employee tends to rise to their level of incompetence.
References
Quotes (1)
“In a hierarchy, every employee tends to rise to his level of incompetence.”
— Laurence J. Peter, The Peter Principle (1969), with Raymond Hull; checked in the Internet Archive scan of a 1969 UK editionWatch on YouTube: The Peter Principle (BBC, 1974) ↗Laurence J. Peter explains the principle (1974)