Leonard Sax is an American psychologist and a practicing family physician. He is best known as the author of three books for parents: Boys Adrift, Girls on the Edge, and Why Gender Matters. According to his web site, he is currently employed as a physician at a healthcare facility in Chester County Pennsylvania, where he also resides.
Sax's views on gender differences have been controversial.
Sax graduated Phi Beta Kappa from the Massachusetts Institute of Technology (MIT) in 1980 with a bachelor's degree in biology. He completed the combined M.D.-Ph.D. program at the University of Pennsylvania in 1986. His Ph.D. is in psychology. He completed the 3-year residency in family practice at Lancaster General Hospital in 1989. In 1990, he founded Poolesville Family Practice, a primary care practice in Montgomery County, Maryland. He began an extended sabbatical from medical practice in June 2008. In December 2013, he returned to full-time clinical practice as an employee of Lancaster General Health.