1945–1960 in Western fashion
Young adults returning to college under the G.I. Bill adopted an unpretentious, functional wardrobe, and continued to wear blue jeans with shirts and pullovers for general informal wear after leaving school. Jack Kerouac introduced the phrase "Beat Generation" in 1948, generalizing from his social circle to characterize the underground, anti-conformist youth gathering in New York at that time. The term "beatnik" was coined by Herb Caen of the "San Francisco Chronicle" in 1958, and the stereotypical "beat" look of sunglasses, berets, black turtlenecks, and unadorned dark clothing provided another fashion alternative for youths of both sexes, encouraged by the marketing specialists of Madison Avenue.
History of the hippie movement
The Beat Generation, especially those associated with the San Francisco Renaissance, gradually gave way to the 1960s era counterculture, accompanied by a shift in terminology from "beatnik" to "freak" and "hippie". Many of the original Beats remained active participants, notably Allen Ginsberg, who became a fixture of the anti-war movement. On the other hand, Jack Kerouac broke with Ginsberg and criticized the 1960s protest movements as an "excuse for spitefulness". Bob Dylan became close friends with Allen Ginsberg, and Ginsberg became close friends with Timothy Leary. Both Leary and Ginsberg were introduced to LSD by Michael Hollingshead in the early 1960s, and both became instrumental in popularizing psychedelic substances to the hippie movement.