Bestselling author and psychologist Thomas Armstrong's exploration and celebration of neurodivergence, completely revised with the most up-to-date research and insights. From ADHD and dyslexia to autism, the number of diagnosis categories listed by the American Psychiatric Association has tripled in the last fifty years. With so many people affected, it is time to revisit our perceptions of people with disabilities. Bestselling author, psychologist, and educator Thomas Armstrong illuminates a new understanding of neuropsychological disorders. He argues that if they are a part of the natural diversity of the human brain, they cannot simply be defined as illnesses. Armstrong explores the evolutionary advantages, special skills, and other positive dimensions of these conditions, including: autism, ADHD, dyslexia, schizophrenia, anxiety, intellectual disabilities, and mood disorders. With an emphasis on positive niche construction for each area, The Power of Neurodiversity is a manifesto