Leonard Sax M.D., Ph.D.

Leonard Sax MD PhD earned his bachelor’s degree in biology from the Massachusetts Institute of Technology in Cambridge, Massachusetts, where he graduated Phi Beta Kappa in five semesters at the age of 19. He then went on to the University of Pennsylvania, where he earned both his PhD in psychology, and his MD. Next he did a 3-year residency in family practice at Lancaster General Hospital in Lancaster Pennsylvania.

In 1990, Dr. Sax established a family practice in Montgomery County Maryland, just outside Washington DC. He provided primary care services to children and adults in Montgomery County for more than 18 years. He took a 5-year sabbatical to devote himself full-time to speaking engagements and to researching his fourth book The Collapse of Parenting, which was published by Basic Books in December 2015 and which became a New York Times bestseller. In 2013 Dr. Sax returned to clinical practice near his home in Chester County, Pennsylvania, while continuing to do speaking engagements. A revised and updated edition of his first book Why Gender Matters was published in August 2017.

Dr. Sax has built an international reputation as an expert in issues of child and adolescent development. He has spoken on issues of child and adolescent development for clients not only all across North America – from California to Nova Scotia and from Alaska to Florida – but also in Australia, Bermuda, Canada, England, Germany, Italy, Mexico, New Zealand, Scotland, Spain, and Switzerland.

He has written four best-selling books for parents:

• Why Gender Matters (Doubleday)
• Boys Adrift (Basic Books)
• Girls on the Edge (Basic Books)
• The Collapse of Parenting (Basic Books)

Dr. Sax has been a guest in the studio for the TODAY Show (five times), CNN (three times), PBS, Fox News, NPR, the BBC, and many other national and international media. His essays about a wide range of child and adolescent issues have been published in the Washington Post, The Wall Street Journal, The Los Angeles Times, and many other outlets. His scholarly work has been published in a wide variety of journals including the Journal of the American Medical Association (JAMA), American Psychologist, Behavioral Neuroscience, Environmental Health Perspectives, Journal of the American College of Nutrition, Journal of Sex Research, and Annals of Family Medicine. You can watch streaming video of some of the TV interviews, and read some of his published essays, at www.leonardsax.com.