DR. THEODORE H. SCHWARTZ, M.D., is a professor of neurosurgery at the Icahn School of Medicine at Mount Sinai Hospital in New York City, one of the busiest and highest-ranked neurosurgery centers in the world. He has published more than 500 scientific articles and chapters on neurosurgery and has lectured around the world – from Bogotá, Colombia, to Vienna to Mumbai – on new, minimally invasive surgical techniques that he helped develop. His book, Gray Matters. A Biography of Brain Surgery (Dutton/Penguin-Random House), was selected by The Economist as one of the best books of 2024. His writing has also been featured in The Wall Street Journal, The Boston Globe, Psyche, The British Psychological Society, LitHub, and MedPage Today. Schwartz is currently the CEO of a med tech company, Illumination Diagnostics, Inc. He studied philosophy, literature, and medicine at Harvard.