'The Peter Principle has cosmic implications.' - New York Times 'The classic book which warns of the dangers of over-promotion' The Times In a hierarchy, every employee rises to the level of their own incompetence. This simple maxim, defined by this classic book over 40 years ago, has become a beacon of truth in the world of work. From the civil service to multinational companies to hospital management, it explains why things constantly go wrong: promotion up a hierarchy inevitably leads to over-promotion and incompetence. Through barbed anecdotes and wry humour the authors define the problem and show how anyone, whether at the top or bottom of the career ladder, can avoid its pitfalls. Or, indeed, avoid promotion entirely!