The phrase most famously refers to the influential self-help book by Dr. Robert Glover, but it also has deep roots in rock music and 20th-century pop culture. The Psychological Framework: Dr. Robert Glover’s Book
: The book encourages men to become " Integrated Males "—individuals who accept their own needs, set firm boundaries, and express their authentic selves rather than a "chameleon-like" version designed to please others. No More Mr. Nice Guy