Richard D. Ryder

Richard Hood Jack Dudley Ryder (born 3 July 1940) is an English writer, psychologist, and animal rights advocate. Ryder became known in the 1970s as a member of the Oxford Group, a group of intellectuals loosely centred on the University of Oxford who began to speak out against animal use, in particular factory farming and animal research. He was working at the time as a clinical psychologist at the Warneford Hospital in Oxford, and had himself been involved in animal research in the United Kingdom and United States.