Tim Kasser is Professor of Psychology at Knox College in Illinois and author of various books on materialism, values, well being and environmental sustainability including ‘The High Price of Materialism’ and ‘Psychology and consumer culture’. He’s going to talk to us today about a book he co-authored with Tom Crompton entitled ‘Meeting Environmental Challenges: The Role of Human Identity’ , how they see this as being often a missing link in environmental campaigning and how this all might relate to the Middle Way.