John Gregory (moralist)

John Gregory (3 June 1724 – 9 February 1773), a.k.a. John Gregorie, was an eighteenth-century Scottish physician, medical writer and moralist.

Gregory, the grandson of James Gregory, was born in Aberdeen, Scotland to the professor of medicine James Gregorie and Anna Chalmers, his father's second wife. Gregory's father died when he was eight years old. From then on Principal Chalmers, his grandfather, and his half-brother James, a professor of medicine, took over his education. His cousin Thomas Reid, the moral philosopher, also guided and influenced his education. Gregory attended a local grammar school and later King's College, University of Aberdeen. In 1742 he and his mother moved to Edinburgh where he studied medicine. There he became friends with the physician and poet Mark Akenside. Gregory went to Leiden to continue his studies in 1745. In 1746, soon after receiving his degree, he was appointed professor of philosophy at King's College. He taught mathematics and moral and natural philosophy. He was also a practicing doctor and preferring patients to lecturing, he resigned his academic post in 1749.