Who invented the concept of social engineering?

Social Engineering is tricking people into doing something you want them to, so it's been around since the begining of time. The person who brought it into common knowlage was Kevin Mitnick one of the most famous hackers in history wanted by the U.S. Marshalls and after a while caught by them. As his parole he couldn't profit from his experience with hacking for ten years meaning he couldn't write any books, but after the ten years he wrote the Art of Deception which is a great book and has great stories of social engineering.