" For most of human history, the only instrument needed to induce employees to complete their duties energetically and adroitly was the whip.

But the rules of employment had to be rewritten with the emergence of tasks whose adequate performance required their protagonists to be a significant degree content, rather than simply terrified or resigned. Once it became evident that someone who was expected to remove brain tumours, draw up binding legal documents or sell condominiums with convincing energy could not profitably be sullen or resentful, morose or angry, the mental well-being of employees commenced to be a supreme object of managerial concern. "

― Alain de Botton , The Pleasures and Sorrows of Work