John Godolphin Bennett (8 June 1897 – 13 December 1974) was a British mathematician, scientist, technologist, industrial research director and author. He is perhaps best known for his many books on psychology and spirituality, particularly on the teachings of G. I. Gurdjieff. Bennett met Gurdjieff in Istanbul in October 1920 and later helped to co-ordinate the work of Gurdjieff in England after Gurdjieff's arrival in Paris. He also was active in starting the British section of the Subud movement, and co-founded its British headquarters.
Bennett was born in London, England, educated at King's College School, London; Royal Military Academy, Woolwich; School of Military Engineering, Chatham; and the School of Oriental Studies, London.
He was a Fellow of the Institute of Fuel, London, from 1938 onwards; Chairman, Conference of Research Associations, 1943–1945; Chairman, Solid Fuel Industry, British Standards Institution, 1937–1942; Chairman and Director, Institute for the comparative study of History, Philosophy, and the Sciences, Kingston upon Thames, 1946–1959.
Bennett's parents met in Florence, Italy although his mother was American. In his infancy, his family were moderately wealthy and travelled frequently in Europe. In 1912, his father, who was a noted traveller, adventurer and linguist, lost all of his money and his wife's in an investment that failed. Bennett himself would later display an extraordinary talent for languages, which enabled him to talk with many spiritual teachers in their native tongues, and to study Hindu, Buddhist, Islamic and Christian sacred texts in their original forms.