Zindel Segal is a distinguished professor of psychology in mood disorders at the University of Toronto Scarborough. He is one of the pioneers in the development of Mindfulness-Based Cognitive Therapy (MBCT), a psychological therapy designed to aid in preventing the relapse of depression. His work integrates cognitive-behavioral approaches with mindfulness meditation techniques to help individuals suffering from chronic unhappiness and depression. Segal has contributed significantly to the field of clinical psychology and authored numerous books and articles on the subject of mental health, particularly mindfulness and mood disorders. His research continues to influence therapeutic practices and promote mental well-being.