Many of the members of the Tavistock Institute went on to play major roles in psychology. John Rawlings Rees became first president of the World Federation for Mental Health. Jock Sutherland became director of the new post-war Tavistock Clinic, when it was incorporated into the newly established British National Health Service in 1946. Ronald Hargreaves became deputy director of the World Health Organization. Tommy Wilson became chairman of the Tavistock Institute. One of the most influential figures to emerge from the Institute was the psychoanalyst Isabel Menzies Lyth. Her seminal paper 'A case study in the functioning of social systems as a defence against anxiety' (1959) inspired a whole branch of organisational theory emphasising unconscious forces that shape organizational life. A.K. Rice did considerable work on problems of management, increasing productivity at one factory by 300%. Eric Miller became director of the "Group Relation Program" in 1969, and in this function he later developed the design of the Nazareth-Conferences.