John William Coltrane (September 23, 1926 – July 17, 1967 Hamlet, NC) was an American jazz saxophonist and composer. Working in the bebop and hard bopidioms early in his career, Coltrane helped pioneer the use of modes and was at the forefront of free jazz. He led at least fifty recording sessions and appeared on many albums by other musicians, including trumpeter Miles Davis and pianist Thelonious Monk. Over the course of his career, Coltrane’s music took on an increasingly spiritual dimension, as exemplified on his most acclaimed albums A Love Supreme (1965) and Ascension (1966). He remains one of the most influential saxophonists in music history. He received numerous posthumous awards, including a Pulitzer Prize in 2007, and was canonized by the African Orthodox Church. His second wife was pianist and harpist Alice Coltrane. The couple had three children: John Jr. (1964–1982), a bassist; Ravi (born 1965), a saxophonist; and Oran (born 1967), also a saxophonist.

Coltrane died of liver cancer at the age of 40 on July 17, 1967, at Huntington Hospital on Long Island. His funeral was held four days later at St. Peter’s Lutheran Church in New York City. The service was started by the Albert Ayler Quartet and finished by the Ornette Coleman Quartet. Coltrane is buried at Pinelawn Cemetery in Farmingdale, New York.

Biographer Lewis Porter speculated that the cause of Coltrane’s illness was hepatitis, although he also attributed the disease to Coltrane’s heroin use at a previous period in his life. Frederick J. Spencer wrote that Coltrane’s death could be attributed to his needle use “or the bottle, or both.” He stated that “[t]he needles he used to inject the drugs may have had everything to do with” Coltrane’s liver disease: “If any needle was contaminated with the appropriate hepatitis virus, it may have caused a chronic infection leading to cirrhosis or cancer.” He noted that despite Coltrane’s “spiritual awakening” in 1957, “[b]y then, he may have had chronic hepatitis and cirrhosis… Unless he developed a primary focus elsewhere in later life and that spread to his liver, the seeds of John Coltrane’s cancer were sown in his days of addiction.