1940s in jazz of the time initially met with a divided, sometimes hostile response among fans and fellow musicians, especially established swing players, who bristled at the new harmonic sounds. To hostile critics, bebop seemed to be filled with "racing, nervous phrases". Despite the initial friction, by the 1950s bebop had become an accepted part of the jazz vocabulary. 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. The swing era lasted until the mid-1940s, and produced popular tunes such as Duke Ellington's "Cotton Tail" (1940) and
Ahmadiyya in the United States Clouds." Although Dizzy Gillespie, Miles Davis, and John Coltrane did not become Ahmadi Muslims, they were influenced by the spirit of Islam bought by the Ahmadis. "A Love Supreme", one of Coltrane's greatest pieces of work, considered by some as the greatest Jazz album of all time, was deeply influenced by the work of the Ahmadiyya movement. In the liner notes of the album, Coltrane repeatedly echoes "Basmala", the opening verse of almost every chapter of the Quran: "Now and again through the unerring hand of God, I do perceive his ... Omnipotence ... He is Gracious and Merciful." Between