Tom Wolfe explains how nostalgie de la boue brought Radical Chic to the fore in New York Society:
Nostalgie de la boue is a 19th-century French term that means, literally, “nostalgia for the mud.” Within New York Society nostalgie de la boue was a great motif throughout the 1960s, from the moment two socialites, Susan Stein and Christina Paolozzi, discovered the Peppermint Lounge and the twist and two of the era’s first pet primitives, Joey Dee and Killer Joe Piro. Nostalgie de la boue tends to be a favorite motif whenever a great many new faces and a lot of new money enter Society. New arrivals have always had two ways of certifying their superiority over the hated “middle class.” They can take on the trappings of aristocracy, such as grand architecture, servants, parterre boxes and high protocol; and they can indulge in the gauche thrill of taking on certain styles of the lower orders. The two are by no means mutually exclusive; in fact, they are always used in combination. In England during the Regency period, a period much like our own — even to the point of the nation’s disastrous involvement in colonial wars during a period of mounting affluence — nostalgie de la boue was very much the rage. London socialites during the Regency adopted the flamboyant capes and wild driving styles of the coach drivers, the “bruiser” fashions and hair styles of the bare-knuckle prize fighters, the see-through, jutting-nipple fashions of the tavern girls, as well as a reckless new dance, the waltz. Such affectations were meant to convey the arrogant self-confidence of the aristocrat as opposed to the middle-class striver’s obsession with propriety and keeping up appearances. During the 1960s in New York nostalgie de la boue took the form of the vogue of rock music, the twist-frug genre of dances, Pop Art, Camp, the courting of pet primitives such as the Rolling Stones and José Torres, and innumerable dress fashions summed up in the recurrent image of the wealthy young man with his turtleneck jersey meeting his muttonchops at mid-jowl, à la the 1962 Sixth Avenue Automat bohemian, bidding good night to an aging doorman dressed in the mode of an 1870 Austrian army colonel.