Glynn Harrison is Norah Cooke Hurle Professor of Mental Health in the Department of Psychiatry, University of Bristol. He is a consultant psychiatrist interested in early interventions for young adults and the evaluation of interventions to enhance evidence-based practice. He researches the epidemiology of mental disorders, and is interested in the relative contributions of biological and social/environmental risk factors. He has acted as an Adviser to the World Health Organization and the UK Health Department and he is currently President of the International Federation of Psychiatric Epidemiology. He is a Diocesan Lay Minister and a member of the General Synod of the Church of England.