"The evolution of Modernist into Mod was a matter of music, clothes, stimulants, dance, ways of walking and ways of standing. They owed much to the pioneering slouch and stroll of David McCallum (not Robert Vaughn) in the television series The Man From Uncle (a far-sighted piece of futurism in which a United States secret agent--Vaughn--found himself collaborating with a Soviet spy--McCallum), and of Steve McQueen (again, emphatically not Robert Vaughn) in The Magnificent Seven. Insouciance was the desired effect, unhurried cool ... 'You'd have to look totally relaxed, but right; you put your leg against the wall, you'd put your hands in your Levis or your jacket pocket with your thumbs sticking out.'"
Poor Robert Vaughn--always the one standing next to the Cool one! I was left wondering what the author had against him.
(FYI, the book was "High Sixties: The Summers of Riot and Love" by Roger Hutchinson.)