Dr. David M. Carreon is a psychiatrist and cofounder of Acacia Mental Health, a clinic in Silicon Valley working to transform mental health care. He studied and served at Stanford, where he earned his MD, completed a psychiatry residency, and worked as a professor. He is a leading clinician in the treatment of major depressive disorder, achieving success in some of the most challenging cases using an approach that combines the latest technologies and the oldest truths. His research has focused on human agency and on new ways to restore freedom through treating depression. He loves teaching; going on dates with his wife, Abigail; and excessively long brunch conversations.