Rodney Collin (April 26, 1909 May 3, 1956) was a British writer in the area of spiritual development. His work was heavily influenced by his teacher, P. D. Ouspensky, and through him, G. I. Gurdjieff, and their system of spiritual development. Rodney Collin is one of the most well known of Ouspenky's students, and a prolific writer. He met Ouspensky in the autumn of 1936. "Rodney Collin immediately recognised that he had found what he had been searching for in his reading and travels. From then on he dedicated all his time to the study of Mr Ouspensky's teaching." Collin's best known work, The Theory of Celestial Influence, is an ambitious attempt to unite astronomy, physics, chemistry, human physiology, and world history with Collin's version of planetary influences.