Robert M. Sapolsky is the author of several works of nonfiction, including Determined, The Trouble with Testosterone, and Why Zebras Don't Get Ulcers. His book Behave was a New York Times bestseller and named a Best Book of the Year by The Washington Post and The Wall Street Journal. He is a professor of biology and neurology at Stanford University and the recipient of a MacArthur Foundation Genius Grant. He and his wife live in San Francisco.