For anyone who wants to do a deep dive look into the life and works of George Gurdjieff and Oscar Ichazo. The Enneagram did not originate from the scientific method. It is a rebranded meld of eastern mysticism, new age woo, and Greek philosophy sold to the corporate elite as a tool to brand and control their employees. It's as much a religion as is Scientology.

Just take a look at one of the testing centers and the history they themselves list. https://www.integrative9.com/enneagram/history/