History of modern Western subcultures wider audience. A subculture of rural jazz and blues fans had mixed elements of jazz and blues into traditional cowboy and folk song styles to produce a crossover called western swing. Thanks to the prevalence of radio, this music spread across the United States in the 1940s. Radio was the first "almost instantaneous" mass media with the power to create large subcultures by spreading the ideas of small subcultures across a wide area. Bebop, a new jazz subculture, formed from the rebellion against the melodic stylings of swing; Notable players included Dizzy Gillespie and Charlie Parker. In turn, bebop spawned
John Coltrane played together occasionally in the late 1940s. He was a member of groups led by Dizzy Gillespie, Earl Bostic, and Johnny Hodges in the early to mid-1950s. In the summer of 1955, Coltrane was freelancing in Philadelphia while studying with guitarist Dennis Sandole when he received a call from Davis. The trumpeter, whose success during the late forties had been followed by several years of decline in activity and reputation, due in part to his struggles with heroin, was again active and about to form a quintet. Coltrane was with this edition of the Davis band (known as the "First