There was a lot of talk in the past about PayPal mafia, a group of ex-PayPal folks who after moving on from PayPal went on to found major Tech companies - Tesla, Youtube, Spacex, Palantir, LinkedIn, and so forth.
I got the feeling that cDc (Cult of the Dead Cow) was something similar for cybersecurity after reading This Is How They Tell Me the World Ends.
The book traces the history of the Cult of the Dead Cow (cDc) from its founding. It reads like a biography written by a fan. It mentions many famous people. Was surprised to see Beto O’Rourke’s name. Mudge (Peiter Zatko) who became famous while at Twitter features prominently. I means, he was already famous among the tech circles. He probably got world-wide recognition during this period.