With a background in medicine, psychology and groupwork, Dr. Chris Johnstone is a specialist in the psychology of positive change. After working for many years as an addictions specialist in the UK health service, he now focuses on teaching, training and writing. Chris has been active in the Transition movement, contributing to a chapter on the psychology of change in The Transition Handbook by Rob Hopkins. He has pioneered the application of the positive psychology approach in health-care, within organisations and in adult education. He edits the online newsletter The Great Turning Times. For more information, see www.chrisjohnstone.info.