Jazz in the post-war years: In the early 1940s, bebop-style performers began to shift jazz from danceable popular music toward a more challenging "musician's music." The most influential bebop musicians included saxophonist Charlie Parker, pianists Bud Powell and Thelonious Monk, trumpeters Dizzy Gillespie and Clifford Brown, and drummer Max Roach. Divorcing itself from dance music, bebop established itself more as an art form, thus lessening its potential popular and commercial appeal. Composer Gunther Schuller wrote, "In 1943 I heard the great Earl Hines band which had Bird in it and all those other great musicians. They were playing all the flatted
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