Dale Carnegie created it, Tim Ferriss is a century too late to point as origin.
Dale Carnegie -> Jim Rohn -> Tony Robbins -> [all hacks now]
Why is Tony Robbins a hack?
the man leveraged the fact that his name was the same as Andrew Carnegie (having no relation) to launch a publishing empire. it was hacks from the beginning
Highly recommend "If Books Could Kill"
https://bsky.app/profile/ifbookspod.bsky.social
It really is all the same book.
All the writers that I love to hate - hariri, gladwell! Will give it a listen
Even worse he changed his name from Carnagey, presumably to deliberately cause confusion.