Dr. Caroline Leaf is a qualified communication pathologist with a bachelor’s degree in logopaedics and both a master’s and PhD in communication pathology, specializing in cognitive neuroscience and neuropsychology. She ran a clinical practice for twenty-five years, serving patients in health care, education, and the corporate world. Dr. Leaf is now an international and national conference speaker and author on topics relating to thinking, the mind and how it changes the brain, neuroplasticity, mental health, optimal brain performance, toxic stress, toxic thoughts, male/female brain differences, intellectual development and learning, controlling our thought lives, wisdom, and how to identify and use one’s natural gifts. She and her husband, Mac, live with their four children in the United States.