John Stradbroke Gregory (2 August 1923 – 22 June 2021), known as Jack and generally publishing as J.S. Gregory, was an Australian professor of Chinese history noted for his biography on Chiang Kai-shek and British involvement in the Taiping Rebellion. Born in Melbourne, he taught at Melbourne High School from 1946 to 1950 and again in 1952 before pursuing a PhD at SOAS University of London.[1] [2] After beginning to teach at Melbourne University (1958–67) most of his professional life was spent at La Trobe University.[2] He gave the 1984 Morrison Lecture on "The Chinese and their Revolutions"[3] (an allusion to a work by Thomas Taylor Meadows) and contributed the George Ernest Morrison entry to the Australian Dictionary of Biography.[4]